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.

Producing acidity; converting 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.

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.

The poisonous herb aconite; also, an extract from it.

Threadlike defensive organs, composed largely of nettling cells (cnid/), thrown out of the mouth or special pores of certain Actini/ when irritated.

Anciently, a snake, called dart snake; now, one of a genus of reptiles closely allied to the lizards.

Relieving weariness; restorative.

The fruit of the oak, being an oval nut growing in a woody cup or cupule.

One of the sessile cirripeds; a barnacle of the genus Balanus. See Barnacle.

Furnished or loaded with acorns.

A denial of the existence of the universe as distinct from God.

One who denies the existence of the universe, or of a universe as distinct from God.

A plant which has no cotyledons, as the dodder and all flowerless plants.

Having no seed lobes, as the dodder; also applied to plants which have no true seeds, as ferns, mosses, etc.

A small species of agouti (Dasyprocta acouchy).

An instrument for measuring the acuteness of the sense of hearing.

The measuring of the power or extent of hearing.

A medicine or agent to assist hearing.

Of or pertaining to acoustics.

In relation to sound or to hearing.

One versed in acoustics.

The science of sounds, teaching their nature, phenomena, and laws.

To furnish or give experimental knowledge of; to make (one) to know; to make familiar; -- followed by with.

Easy to be acquainted with; affable.

A state of being acquainted, or of having intimate, or more than slight or superficial, knowledge; personal knowledge gained by intercourse short of that of friendship or intimacy; as, I know the man; but have no acquaintance with him.

A state of being acquainted; acquaintance.

An acquaintance.

Personally known; familiar. See To be acquainted with, under Acquaint, v. t.

State of being acquainted; degree of acquaintance.

To rest satisfied, or apparently satisfied, or to rest without opposition and discontent (usually implying previous opposition or discontent); to accept or consent by silence or by omitting to object; -- followed by in, formerly also by with and to.

The quality of being acquiescent; acquiescence.

Resting satisfied or submissive; disposed tacitly to submit; assentive; as, an acquiescent policy.

In an acquiescent manner.

To quiet.

The quality of being acquirable; attainableness.

Capable of being acquired.

To gain, usually by one's own exertions; to get as one's own; as, to acquire a title, riches, knowledge, skill, good or bad habits.

gotten through environmental forces. Contrasted with inherited.

The act of acquiring, or that which is acquired; attainment.

A person who acquires.

Acquirement.

Acquired.

The act or process of acquiring.

Acquired.

In the way of acquisition.

The quality of being acquisitive; propensity to acquire property; desire of possession.