Heliacal.

Emerging from the light of the sun, or passing into it; rising or setting at the same, or nearly the same, time as the sun.

In a heliacal manner.

An artificial, orange dyestuff, analogous to tropaolin, and like it used as an indicator in alkalimetry; -- called also methyl orange.

Of or pertaining to the Helianthoidea.

An order of Anthozoa; the Actinaria.

any plant of the genus Helianthus having large flower heads with dark disk florets and showy yellow rays.

Of or pertaining to, or in the form of, a helix; spiral; as, a helical staircase; a helical spring.

A genus of composite plants, with shining, commonly white or yellow, or sometimes reddish, radiated involucres, which are often called /everlasting flowers./

Having the form of a helix; spiral.

A glucoside obtained as a white crystalline substance by partial oxidation of salicin, from a willow (Salix Helix of Linnaeus.)

Curled; spiral; helicoid; -- applied esp. to certain arteries of the penis.

An instrument for drawing spiral lines on a plane.

A warped surface which may be generated by a straight line moving in such a manner that every point of the line shall have a uniform motion in the direction of another fixed straight line, and at the same time a uniform angular motion about it.

Same as Helicoid.

A mountain in B/otia, in Greece, supposed by the Greeks to be the residence of Apollo and the Muses.

One of numerous species of Heliconius, a genus of tropical American butterflies. The wings are usually black, marked with green, crimson, and white.

Of or pertaining to Helicon.

to transport in a helicopter.

The opening by which the two scalae communicate at the top of the cochlea of the ear.

pertaining to the sun's center, or appearing to be seen from it; having, or relating to, the sun as a center; -- opposed to geocentrical.

A photograph in colors.

Pertaining to, or produced by, heliochromy.

The art of producing photographs in color.

A message transmitted by a heliograph.

To telegraph, or signal, with a heliograph.

Of or pertaining to a description of the sun.

The description of the sun.

The process of photographic engraving.

A worshiper of the sun.

Sun worship. See Sabianism.

A fossil coral of the genus Heliolites, having twelve-rayed cells. It is found in the Silurian rocks.

An instrument devised originally for measuring the diameter of the sun; now employed for delicate measurements of the distance and relative direction of two stars too far apart to be easily measured in the field of view of an ordinary telescope.

Of or pertaining to the heliometer, or to heliometry.

The apart or practice of measuring the diameters of heavenly bodies, their relative distances, etc. See Heliometer.

An East Indian stony coral now known to belong to the Alcyonaria; -- called also blue coral.

A telescope or instrument for viewing the sun without injury to the eyes, as through colored glasses, or with mirrors which reflect but a small portion of light.

An instrument consisting of a mirror moved by clockwork, by which a sunbeam is made apparently stationary, by being steadily directed to one spot during the whole of its diurnal period; also, a geodetic heliotrope.

An instrument or machine for showing when the sun arrived at the tropics and equinoctial line.

The person at a geodetic station who has charge of the heliotrope.

Manifesting heliotropism; turning toward the sun.

The phenomenon of turning toward the light, seen in many leaves and flowers.

A picture obtained by the process of heliotypy.

Relating to, or obtained by, heliotypy.

A method of transferring pictures from photographic negatives to hardened gelatin plates from which impressions are produced on paper as by lithography.

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.

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 natural family of lizards, including the only known venomous lizards.

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.