not containing cells

Not centered; without a center.

One of the Acephala.

That division of the Mollusca which includes the bivalve shells, like the clams and oysters; -- so called because they have no evident head. Formerly the group included the Tunicata, Brachiopoda, and sometimes the Bryozoa. See Mollusca.

Belonging to the Acephala.

A fabulous people reported by ancient writers to have heads.

One who acknowledges no head or superior.

A larval entozo/n in the form of a subglobular or oval vesicle, or hydatid, filled with fluid, sometimes found in the tissues of man and the lower animals; -- so called from the absence of a head or visible organs on the vesicle. These cysts are the immature stages of certain tapeworms. Also applied to similar cysts of different origin.

Pertaining to, or resembling, the acephalocysts.

A canal or trench for irrigating land.

type genus of the Aceraceae; trees or shrubs having winged fruit.

the family of trees including the maples.

Acerose; needle-shaped.

Sour, bitter, and harsh to the taste, as unripe fruit; sharp and harsh.

To sour; to imbitter; to irritate.

Sour or severe.

Sourness and harshness.

Sourness of taste, with bitterness and astringency, like that of unripe fruit.

Pertaining to, or obtained from, the maple; as, aceric acid.

Having the nature of chaff; chaffy. Needle-shaped, having a sharp, rigid point, as the leaf of the pine.

Destitute of tentacles, as certain mollusks. Without antenn/, as some insects.

Pertaining to a heap.

Heaped, or growing in heaps, or closely compacted clusters.

A heaping up; accumulation.

Heaped up; tending to heap up.

Full of heaps.

Resembling little heaps.

The quality of being acescent; the process of acetous fermentation; a moderate degree of sourness.

A substance liable to become sour.

An acetabulum; or about one eighth of a pint.

Cup-shaped; saucer-shaped; acetabuliform.

The division of Cephalopoda in which the arms are furnished with cup-shaped suckers, as the cuttlefishes, squids, and octopus; the Dibranchiata. See Cephalopoda.

Furnished with fleshy cups for adhering to bodies, as cuttlefish, etc.

Shaped like a shallow cup; saucer-shaped; as, an acetabuliform calyx.

A limpid, colorless, inflammable liquid from the slow oxidation of alcohol under the influence of platinum black.

Acetic aldehyde. See Aldehyde.

A white crystalline solid, from ammonia by replacement of an equivalent of hydrogen by acetyl.

a white crystalline compound (HO.C6H4.NH.CO.CH3) used as an analgesic and also as an antipyretic. It has molecular weight 151.16. It is the active ingredient in the commercial analgesics Tylenol and Datril.

An amide formed from aniline and an acetyl group (C6H5.NH.CO.CH3); it is a white crystalline compound used as an analgesic and also as an antipyretic. It has molecular weight 135.16.

Used in salads; as, acetarious plants.

An acid pulp in certain fruits, as the pear.

A salt formed by the union of acetic acid with a base or positive radical; as, acetate of lead, acetate of potash.

Combined with acetic acid.

Of a pertaining to vinegar; producing vinegar; producing vinegar; as, acetic fermentation. Pertaining to, containing, or derived from, acetyl, as acetic ether, acetic acid. The latter is the acid to which the sour taste of vinegar is due.

The act of making acetous or sour; the process of converting, or of becoming converted, into vinegar.

An apparatus for hastening acetification.

To turn acid.

An instrument for estimating the amount of acetic acid in vinegar or in any liquid containing acetic acid.

The act or method of ascertaining the strength of vinegar, or the proportion of acetic acid contained in it.

A combination of acetic acid with glycerin.

To acetify.

Methyl ketol; also, any of various homologues of the same.

Same as Acetimeter.

A morbid condition characterized by the presence of ketone bodies (including acetone, acetoacetic acid and beta-hydroxybutyric acid) in the blood, as in diabetes.

A volatile liquid (CH3.CO.CH3); pyroacetic spirit; methyl ketone; -- obtained by fermentation, the distillation of certain acetates, or by the destructive distillation of citric acid, starch, sugar, or gum, with quicklime. It is commonly used as a solvent.

Of or pertaining to acetone; as, acetonic bodies.

Excess of ketone bodies (including acetone, acetoacetic acid and beta-hydroxybutyric acid) in the urine, as in starvation or diabetes

A white crystalline compound used as an analgesic and also as an antipyretic.

A crystalline ketone, CH3.CO.C6H5, which may be obtained by the dry distillation of a mixture of the calcium salts of acetic and benzoic acids. It is used as a hypnotic under the name of hypnone.

Sour like vinegar; acetous.

Having a sour taste; sour; acid.

a white crystalline compound used as an analgesic and also as an antipyretic.

A complex, hypothetical radical, composed of two parts of carbon to three of hydrogen and one of oxygen. Its hydroxide is acetic acid.

introduce an acetyl group into a chemical compound

a neurotransmitter released by the transmitting dendron at autononmous synapses and at neuromuscular junctions. It is a quaternary amine with an obligatory negative counterion. The nominal formula for the hydroxide form is C7H17NO3. Structural formula (CH3)3N(+)CH2CH2.O.CO.CH3.OH(-).

an enzyme which exists in nerve cells and hydrolyses acetylcholine into choline and acetic acid.

A gaseous compound of carbon and hydrogen, in the proportion of two atoms of the former to two of the latter. It is a colorless gas, with a peculiar, unpleasant odor, and is produced for use as an illuminating gas in a number of ways, but chiefly by the action of water on calcium carbide. Its light is very brilliant.

Of or pertaining to Achaia in Greece; also, Grecian. A native of Achaia; a Greek.

Savage fierceness; ferocity.

An agate.

A genus of land snails, often large, common in the warm parts of America and Africa.

Purveyor; acater.

To suffer pain; to have, or be in, pain, or in continued pain; to be distressed.

A name given to several species of plants; as, smallage, wild celery, parsley.

See Ach/an, Achaian.

Pertaining to an achene.

A small, dry, indehiscent fruit, containing a single seed, as in the buttercup; -- called a naked seed by the earlier botanists.

A river in the Nether World or infernal regions; also, the infernal regions themselves. By some of the English poets it was supposed to be a flaming lake or gulf.

death's-head moth.

Of or pertaining to Acheron; infernal; hence, dismal, gloomy; moribund.

a genus of Orthopteran insects consisting of common house and field crickets.

the possibility of being achieved or accomplished; -- a property which may be possessed by a contemplated act.

Capable of being achieved.

Achievement.

To carry on to a final close; to bring out into a perfected state; to accomplish; to perform; -- as, to achieve a feat, an exploit, an enterprise.

The act of achieving or performing; an obtaining by exertion; successful performance; accomplishment; as, the achievement of his object.

One who achieves; a winner.

Resembling Achilles, the hero of the Iliad; invincible.

a mythical Greek hero of the Iliad; a foremost Greek warrior at the seige of Troy.

The strong tendon formed of the united tendons of the large muscles in the calf of the leg, an inserted into the bone of the heel; -- so called from the mythological account of Achilles being held by the heel when dipped in the River Styx.

Without a lip.

any plant of the genus Achimenes having gloxinialike flowers.

That aches; continuously painful. See Ache.

Seeds of the annotto tree; also, the coloring matter, annotto.

Not possessing a mantle; -- said of certain gastropods.

Naked; having no floral envelope, neither calyx nor corolla.

Deficiency or lack of bile.

Lacking bile.

A stony meteor lacking chondrules.

of or pertaining to achondrite.

A skeletal disorder beginning before birth; cartilage is converted to bone resulting in dwarfism.

of or pertaining to achondroplasia.

A genus of tropical trees having papery leaves and large fruit.

Free from color; transmitting light without decomposing it into its primary colors.

In an achromatic manner.

Achromatism.

Tissue which is not stained by fluid dyes.

not readily colored by stains; -- of substance of a cell nucleus

remove color from.

The state or quality of being achromatic; as, the achromatism of a lens; achromaticity.

The act or process of achromatizing.

To deprive of color; to make achromatic.

Color blindness; inability to distinguish colors; Daltonism.

Lacking, or deficient in, color; as, achromatous blood.

Free from color; colorless; as, in (Physiol. Chem.), the achromic point of a starch solution acted upon by an amylolytic enzyme is the point at which it fails to give any color with iodine.

See Acronyc.

Dextrin not colorable by iodine. See Dextrin.

Colorless; achromatic.

Without chyle.

Without chyme.