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.

One of the needlelike or bristlelike spines or prickles of some animals and plants; also, a needlelike crystal.

Needle-shaped; slender like a needle or bristle, as some leaves or crystals; also, having sharp points like needles.

Furnished with acicul/. Acicular. Marked with fine irregular streaks as if scratched by a needle.

Needle-shaped; acicular.

Needle ore.

A sour substance.

yielding an acid in aqueous solution

thriving in a relatively acid environment; -- especially of plants requiring a pH well below 7

to wash (blue jeans) in acid, so as to cause the color to fade.

Containing a high percentage of silica; -- opposed to basic.

Containing or yielding an acid.

Capable of being acidified, or converted into an acid.

The act or process of acidifying, or changing into an acid.

A simple or compound principle, whose presence is necessary to produce acidity, as oxygen, chlorine, bromine, iodine, etc.

To make acid; to convert into an acid; as, to acidify sugar.

An instrument for ascertaining the strength of acids.

The measurement of the strength of acids, especially by a chemical process based on the law of chemical combinations, or the fact that, to produce a complete reaction, a certain definite weight of reagent is required.

The quality of being sour; sourness; tartness; sharpness to the taste; as, the acidity of lemon juice.

Sourly; tartly.

Acidity; sourness.

growing well in an acid medium; said of some bacteria

abnormally high acidity of the blood and other body fluids.

of or pertaining to acidosis; suffering from acidosis.

To make sour or acid in a moderate degree; to sour somewhat.

made slightly acidic

Having an acid quality; sour; acidulous.

Slightly sour; sub-acid; sourish; as, an acidulous tincture.

The process of coating the surface of a metal plate (as a stereotype plate) with steellike iron by means of voltaic electricity; steeling.

Shaped like a needle.

Containing seeds or stones of grapes, or grains like them.

A short sword or saber.

Scimeter-shaped; as, an acinaciform leaf.

Same as Akinesia.

A group of suctorial Infusoria, which in the adult stage are stationary. See Suctoria.

Resembling the Acinet/.

Having the form of a cluster of grapes; clustered like grapes.

Consisting of acini, or minute granular concretions; as, acinose or acinous glands.

One of the small grains or drupelets which make up some kinds of fruit, as the blackberry, raspberry, etc. A grapestone.

A genus of ganoid fishes, including the sturgeons, having the body armed with bony scales, and the mouth on the under side of the head. See Sturgeon.

The natural family of fish including the sturgeons.

Operative surgery.

Artillery designed to shoot upward at airplanes; antiaircraft artillery.

red pear-shaped tropical fruit with poisonous seeds; its flesh is poisonous when unripe or overripe.

To recognize.

To own or admit the knowledge of; to recognize as a fact or truth; to declare one's belief in; as, to acknowledge the being of a God.

Capable of being acknowledged.

Generally accepted or recognized as correct or reasonable. Opposite of unacknowledged.

Confessedly.

The act of acknowledging; admission; avowal; owning; confession.

One who acknowledges.

Without inclination or dipping; -- said of the imaginary line near the earth's equator on which the magnetic needle balances itself horizontally, having no dip. The aclinic line is also termed the magnetic equator.

The top or highest point; the culmination.

Inflammation of the sebaceous glands that are associated with hair follicles, leading to visible comedones and pimples, especially on the face, back, and chest.

Pertaining to acnodes.

An isolated point not upon a curve, but whose co/rdinates satisfy the equation of the curve so that it is considered as belonging to the curve.

same as Akocanthera.

In a cocked or turned up fashion.

Hanging at the cathead, ready to let go, as an anchor. Topped up; having one yardarm higher than the other.

small genus of trees and shrubs containing strongly toxic cardiac glycosides; distributed from Arabia to Africa.

Cold.

Pertaining to acology.

Materia medica; the science of remedies.

See Acolythist.

An organic base, in the form of a white powder, obtained from Aconitum lycoctonum.

Same as Acolyte.

An acolyte.

Being without joints; jointless.

Of the nature of aconite.

The herb wolfsbane, or monkshood; -- applied to any plant of the genus Aconitum (tribe Hellebore), all the species of which are poisonous.

Same as Aconitine.

Of or pertaining to aconite.

An intensely poisonous alkaloid, extracted from aconite.