An order of fresh-water rhizopods having a more or less globular form, with slender radiating pseudopodia; the sun animalcule.

an airport for helicopters.

genus of South African and Australian herbs or shrubs grown as everlastings; the various Helipterum species are currently in process of being assigned to other genera, especially Pteropogon and Hyalosperma.

Spiral.

An inert, monoatomic, gaseous element occurring in the atmosphere of the sun and stars, and in small quantities in the earth's atmosphere, in several minerals and in certain mineral waters. It is obtained from natural gas in industrial quantities. Symbol, He; atomic number 2; at. wt., 4.0026 (C=12.011). Helium was first detected spectroscopically in the sun by Lockyer in 1868; it was first prepared by Ramsay in 1895. Helium has a density of 1.98 compared with hydrogen, and is more difficult to liquefy than the latter. Chemically, it is an inert noble gas, belonging to the argon group, and cannot be made to form compounds. The helium nucleus is the charged particle which constitutes alpha rays, and helium is therefore formed as a decomposition product of certain radioactive substances such as radium. The normal helium nucleus has two protons and two neutrons, but an isotope with only one neutron is also observed in atmospheric helium at an abundance of 0.013 %. Liquid helium has a boiling point of -268.9/ C at atmospheric pressure, and is used for maintaining very low temperatures, both in laboratory experimentation and in commercial applications to maintain superconductivity in low-temperature superconducting devices. Gaseous helium at normal temperatures is used for buoyancy in blimps, dirigibles, and high-altitude balloons, and also for amusement in party balloons.

A nonplane curve whose tangents are all equally inclined to a given plane. The common helix is the curve formed by the thread of the ordinary screw. It is distinguished from the spiral, all the convolutions of which are in the plane.

To overwhelm.

recklessly determined; as, hell-bent on winning.

A witch; a hag.

The dabchick.

Haunted by devils; hellish.

A judge or umpire in games or combats.

A large North American aquatic salamander (Protonopsis horrida or Menopoma Alleghaniensis). It is very voracious and very tenacious of life. Also called alligator, and water dog.

Born in or of hell.

Produced in hell.

Prepared in hell.

A composition for infernal purposes; a magical preparation.

Doomed to hell.

A poisonous glucoside accompanying helleborin in several species of hellebore, and extracted as a white crystalline substance with a bittersweet taste. It has a strong action on the heart, resembling digitalin.

A poisonous glucoside found in several species of hellebore, and extracted as a white crystalline substance with a sharp tingling taste. It possesses the essential virtues of the plant; -- called also elleborin.

The practice or theory of using hellebore as a medicine.

A native of either ancient or modern Greece; a Greek.

Of or pertaining to the Hellenes, or Greeks.

The dialect, formed with slight variations from the Attic, which prevailed among Greek writers after the time of Alexander.

A phrase or form of speech in accordance with genius and construction or idioms of the Greek language; a Grecism.

One who affiliates with Greeks, or imitates Greek manners; esp., a person of Jewish extraction who used the Greek language as his mother tongue, as did the Jews of Asia Minor, Greece, Syria, and Egypt; distinguished from the Hebraists, or native Jews (Acts vi. 1).

Pertaining to the Hellenists.

According to the Hellenistic manner or dialect.

To give a Greek form or character to; to Grecize; as, to Hellenize a word.

See Ivorytype.

A narrow strait between Europe and Asia, now called the Daradanelles. It connects the Aegean Sea and the sea of Marmora.

Of or pertaining to the Hellespont.

The aquatic larva of a large American winged insect (Corydalus cornutus), much used a fish bait by anglers; the dobson. It belongs to the Neuroptera.

A hag of or fit for hell.

A dog of hell; an agent of hell.

One who heles or covers; hence, a tiler, slater, or thatcher.

Of or pertaining to hell; like hell; infernal; malignant; wicked; detestable; diabolical.

A kite of infernal breed.

An exclamation used as a greeting, to call attention, as an exclamation of surprise, or to encourage one. This variant of Halloo and Holloo has become the dominant form. In the United States, it is the most common greeting used in answering a telephone.

Toward hell.

Hellish.

To cover or furnish with a helm or helmet.

Guidance; direction.

Covered with a helmet.

A defensive covering for the head. See Casque, Headpiece, Morion, Sallet, and Illust. of Beaver.

Shaped like a helmet; galeate. See Illust. of Galeate.

Wearing a helmet; furnished with or having a helmet or helmet-shaped part; galeate.

An intestinal worm, or wormlike intestinal parasite; one of the Helminthes.

A vermifuge.

One of the grand divisions or branches of the animal kingdom. It is a large group including a vast number of species, most of which are parasitic. Called also Enthelminthes, Enthelmintha.

A disease in which worms are present in some part of the body.

Of or relating to worms, or Helminthes; expelling worms. A vermifuge; an anthelmintic.

One of the sinuous tracks on the surfaces of many stones, and popularly considered as worm trails.

Wormlike; vermiform.

Of or pertaining to helminthology.

One versed in helminthology.

The natural history, or study, of worms, esp. parasitic worms.

Destitute of a helmet.

The man at the helm; a steersman.

A wind attending or presaged by the cloud called helm.

A slave in ancient Sparta; a Spartan serf; hence, a slave or serf.

The condition of the Helots or slaves in Sparta; slavery.

The type genus of the Helotiaceae.

The Helots, collectively; slaves; bondsmen.

To lend aid or assistance; to contribute strength or means; to avail or be of use; to assist.

One who, or that which, helps, aids, assists, or relieves; as, a lay helper in a parish.

Furnishing help; giving aid; assistant; useful; salutary.

a quantity of food served as part of a meal.

Destitute of help or strength; unable to help or defend one's self; needing help; feeble; weak; as, a helpless infant.

A helper; a companion; specifically, a wife.

A wife; a helpmate.

In hurry and confusion; without definite purpose; irregularly.

To furnish with a helve, as an ax.

Same as Helvetic. A Swiss; a Switzer.

Of or pertaining to the Helvetii, the ancient inhabitant of the Alps, now Switzerland, or to the modern states and inhabitant of the Alpine regions; as, the Helvetic confederacy; Helvetic states.

A mineral of a yellowish color, consisting chiefly of silica, glucina, manganese, and iron, with a little sulphur.

A genus of plants consisting of one species; a dwarf creeping mat-forming evergreen herb.

To form a hem or border to; to fold and sew down the edge of.

A species of agate, sprinkled with spots of red jasper.

Same as Haemachrome.

A composition made from blood, mixed with mineral or vegetable substances, used for making buttons, door knobs, etc.

An instrument for measuring the velocity with which the blood moves in the arteries.

The act of measuring the velocity with which the blood circulates in the arteries; haemotachometry.

The principles of dynamics in their application to the blood; that part of science which treats of the motion of the blood.

An instrument by which the pressure of the blood in the arteries, or veins, is measured by the height to which it will raise a column of mercury; -- called also a haemomanometer.

Relating to the blood or blood vessels; pertaining to, situated in the region of, or on the side with, the heart and great blood vessels; -- opposed to neural.

Same as Haemaphaein.

The second element in each half of a hemal arch, corresponding to the sternal part of a rib.

Same as Hemostatic.

Laws relating to the equilibrium of the blood in the blood vessels.

Same as Haematachometer.

A reddish brown or violet crystalline substance, C16H12O6, got from hematoxylin by partial oxidation, and regarded as analogous to the phthaleins.

A vomiting of blood.

A warm-blooded animal.

Warm-blooded; hematothermal.

A medicine designed to improve the condition of the blood.

Hematoxylin.

Any substance, such as an iron salt or organic compound containing iron, which when ingested tends to increase the hemoglobin contents of the blood.

A form of hemoglobinometer.

Relating to the measurement of the amount of hematin or hemoglobin contained in blood, or other fluids.

A red consisting of silica, borax, and soda, fused with oxide of copper and iron, and used in enamels, mosaics, etc.

An important ore of iron, the sesquioxide, so called because of the red color of the powder. It occurs in splendent rhombohedral crystals, and in massive and earthy forms; -- the last called red ocher. Called also specular iron, oligist iron, rhombohedral iron ore, and bloodstone. See Brown hematite, under Brown.

Of or pertaining to hematite, or resembling it.

A tumor filled with blood.

The cold-blooded vertebrates, that is, all but the mammals and birds; -- the antithesis to Hematotherma.

See Hemoglobin.

Resembling blood.

A crystalline or amorphous pigment, free from iron, formed from hematin in old blood stains, and in old hemorrhages in the body. It resembles bilirubin. When present in the corpora lutea it is called haemolutein.

The science which treats of the blood.

The lysis of erythrocytes in the blood with the release of hemoglobin.

A localised leakage of blood from the blood vessels into nearby tissues, usually confined within a tissue or organ; especially, a local swelling produced by an effusion of blood beneath the skin, which may clot and discolor the affected area.

Same as hemophilia; -- an obsolete term.

The hematin of blood.

Sanguification; the conversion of chyle into blood. The arterialization of the blood in the lungs; the formation of blood in general; haematogenesis.

The warm-blooded vertebrates, comprising the mammals and birds; -- the antithesis to hematocrya.

Warm-blooded.

Haematoxylin.

Passage of urine mingled with blood; blood in the urine.

The obtaining of a curve similar to a pulse curve or sphygmogram by allowing the blood from a divided artery to strike against a piece of paper.

One of the partially thickened anterior wings of certain insects, as of many Hemiptera, the earwigs, etc.