Part 4

Ac·eÏtim¶eÏter (#), n. [L. acetum vinegar + Ïmeter: cf. F. ac‚timŠtre.] An instrument for estimating the amount of acetic acid in vinegar or in any liquid containing acetic acid.

Ac·eÏtim¶eÏtry (#), n. The act or method of ascertaining the strength of vinegar, or the proportion of acetic acid contained in it. Ure. Ac¶eÏtin (#), n. (Chem.) A combination of acetic acid with glycerin. Brande & C. Ac¶eÏtize (#), v. i. To acetify. [R.]

Ac·eÏtom¶eÏter (#), n. Same as Acetimeter. Brande & C.

Ac¶eÏtone (#), n. [See Acetic.] (Chem.) A volatile liquid consisting of three parts of carbon, six of hydrogen, and one of oxygen; pyroacetic spirit, Ð obtained by the distillation of certain acetates, or by the destructive distillation of citric acid, starch, sugar, or gum, with quicklime. µ The term in also applied to a number of bodies of similar constitution, more frequently called ketones. See Ketone.

Ac·eÏton¶ic (#), a. Of or pertaining to acetone; as, acetonic bodies.

Ac¶eÏtose (#), a. Sour like vinegar; acetous.

Ac·eÏtos¶iÏty (#), n. [LL. acetositas. See Acetous.] The quality of being acetous; sourness.

AÏce¶tous (#; 277), a. [L. acetum vinegar, fr. acere to be sour.] 1. Having a sour taste; sour; acid. ½An acetous spirit.¸ Boyle. ½A liquid of an acetous kind.¸ Bp. Lowth. 2. Causing, or connected with, acetification; as, acetous fermentation. Acetous acid, a name formerly given to vinegar<-- which contains acetic acid -->. Ac¶eÏtyl (#), n. [L. acetum vinegar + Gr. ? substance. See Ïyl.] (Chem.) A complex, hypothetical radical, composed of two parts of carbon to three of hydrogen and one of oxygen. Its hydroxide is acetic acid.

AÏcet¶yÏlene (#), n. (Chem.) 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. Watts. Ach, Ache } (#), n. [F. ache, L. apium parsley.] A name given to several species of plants; as, smallage, wild celery, parsley. [Obs.] Holland. AÏch‘¶an (#), AÏcha¶ian (#) } a. [L. Achaeus, Achaius; Gr. ?.] Of or pertaining to Achaia in Greece; also, Grecian. Ð n. A native of Achaia; a Greek.

Ø AÏchar¶neÏment (#), n. [F.] Savage fierceness; ferocity.

Ach¶ate (#), n. An agate. [Obs.] Evelyn. AÏchate¶ (#), n. [F. achat purchase. See Cates.] 1. Purchase; bargaining. [Obs.] Chaucer. 2. pl. Provisions. Same as Cates. [Obs.] Spenser.

Ø Ach·aÏti¶na (#), n. [NL., from Gr. ? agate.] (Zo”l.) A genus of land snails, often large, common in the warm parts of America and Africa.

AÏchaÏtour¶ (#), n. [See Cater.] Purveyor; acater. [Obs.] Chaucer. Ache (#), n. [OE. ache, AS. ‘ce, ece, fr. acan to ache. See Ache, v. i.] Continued pain, as distinguished from sudden twinges, or spasmodic pain. ½Such an ache in my bones.½ Shak. µ Often used in composition, as, a headache, an earache, a toothache.

Ache (#), v. i. [imp. & p. p. Ached (#); p. pr. & vb. n. Aching (#).] [OE. aken, AS. acan, both strong verbs, AS. acan, imp. ?c, p. p. acen, to ache; perh. orig. to drive, and akin to agent.] To suffer pain; to have, or be in, pain, or in continued pain; to be distressed. ½My old bones ache.¸ Shak. The sins that in your conscience ache. Keble. AÏche¶an (#), a & n. See Ach‘an, Achaian.

AÏchene¶ (#), AÏche¶niÏum (#) } n. [Gr. ? priv. + ? to gape.] (Bot.) A small, dry, indehiscent fruit, containing a single seed, as in the buttercup; Ð called a naked seed by the earlier botanists. [Written also akene and ach‘nium.]

AÏche¶niÏal (#), a. Pertaining to an achene.

Ach¶eÏron (#), n. [L., fr. Gr. ?.] (Myth.) 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. Shak. Ach·eÏron¶tic (#), a. Of or pertaining to Acheron; infernal; hence, dismal, gloomy; moribund.

AÏchiev¶aÏble (#), a. Capable of being achieved. Barrow.

AÏchiev¶ance (#), n. [Cf. OF. achevance.] Achievement. [Obs.] Sir T. Elyot.

AÏchieve¶ (#), v. t. [imp. & p. p. Achieved (#); p. pr. & vb. n. Achieving (#).] [OE. acheven, OF. achever, achiever, F. achever, to finish; ? (L. ad) + OF. chief, F. chef, end, head, fr. L. caput head. See Chief.] 1. To carry on to a final close; to bring out into a perfected state; to accomplish; to perform; Ð as, to achieve a feat, an exploit, an enterprise. Supposing faculties and powers to be the same, far more may be achieved in any line by the aid of a capital, invigorating motive than without it. I. Taylor. 2. To obtain, or gain, as the result of exertion; to succeed in gaining; to win. Some are born great, some achieve greatness. Shak. Thou hast achieved our liberty. Milton. [Obs., with a material thing as the aim.] Show all the spoils by valiant kings achieved. Prior. He hath achieved a maid That paragons description. Shak. 3. To finish; to kill. [Obs.] Shak. Syn. Ð To accomplish; effect; fulfill; complete; execute; perform; realize; obtain. See Accomplish.

AÏchieve¶ment (#), n. [Cf. F. achŠvement, E. Hatchment.] 1. The act of achieving or performing; an obtaining by exertion; successful performance; accomplishment; as, the achievement of his object. 2. A great or heroic deed; something accomplished by valor, boldness, or praiseworthy exertion; a feat. [The exploits] of the ancient saints... do far surpass the most famous achievements of pagan heroes. Barrow. The highest achievements of the human intellect. Macaulay. 3. (Her.) An escutcheon or ensign armorial; now generally applied to the funeral shield commonly called hatchment. Cussans. AÏchiev¶er (#), n. One who achieves; a winner.

Ach·ilÏle¶an (#), a. Resembling Achilles, the hero of the Iliad; invincible.

AÏchil¶les' ten¶don (#), n. [L. Achillis tendo.] (Anat.) 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; Ð so called from the mythological account of Achilles being held by the heel when dipped in the River Styx.

AÏchi¶lous (#), a. [Gr. ? priv. + ? lip.] (Bot.) Without a lip.

Ach¶ing (#), a. That aches; continuously painful. See Ache. Ð Ach¶ingÏly, adv. The aching heart, the aching head. Longfellow. Ø A·chiÏo¶te (#), n. [Sp. achiote, fr. Indian achiotl.] Seeds of the annotto tree; also, the coloring matter, annotto. AÏchlam¶yÏdate (#), a. [Gr. ? priv. + ?. ?. a short cloak.] (Zo”l.) Not possessing a mantle; Ð said of certain gastropods.

Ach·laÏmyd¶eÏous (#), a. (Bot.) Naked; having no floral envelope, neither calyx nor corolla.

Ø AÏcho¶liÏa (#), n. [NL., from Gr. ?; ? priv. + ? bile.] (Med.) Deficiency or want of bile.

Ach¶oÏlous (#), a. (Med.) Lacking bile.