Aciform, as′i-form, adj. needle-shaped. [L. acus, a needle, and Form, from forma, shape.]
Aciniform, a-sin′i-form, adj. in clusters like grapes, or having the form of grapes. [L. acinus, a grape.]
Acknow, ak-nō′, v.t. (obs.) to know, to recognise.—adj. Acknown (Shak.), known or acquainted. [A.S. on, in, on, cnâwan, to Know.]
Acknowledge, ak-nol′ej, v.t. to own a knowledge of: to own as true: to confess: to admit or give intimation of the receipt of.—adj. Acknow′ledgeable.—adv. Acknow′ledgeably.—n. Acknowledgment, recognition: admission: confession: thanks: a receipt. [From the v. Acknow, with suffix -ledge.]
Aclinic, ak-lin′ik, adj. without inclination, applied to the magnetic equator, which cuts the terrestrial equator, inasmuch as on that line the magnetic needle has no dip, but lies horizontal. [Gr. aklinēs—a, neg., klin-ein, to bend.]
Acme, ak′mē, n. the top or highest point: the culmination or perfection in the career of anything: crisis, as of a disease.—Acme skates, the name given to a kind of skates, formed of steel, fixed to the boot by a mechanical device, permitting them to be quickly fixed on or taken off. [Gr. akmē—akē, a point.]
Acne, ak′nē, n. a common skin disease, an inflammation of the sebaceous follicles of the skin, often occurring on the nose. [A corr. of Gr. akmē, a point.]
Acock, a-kok′, adv. in a cocked manner: defiantly.—A cock-bill (naut.), having the ends pointing upward, as of an anchor hanging by its ring at the cat-head, in a position for dropping; or of the yards when topped up by one lift to an angle with the deck—the symbol of mourning. [Prep. a, and Cock.]
Acœmeti, a-sem′ē-tī, n.pl. a congregation of monks founded in 460 near Constantinople, who by alternating choirs kept divine service going on day and night without intermission in their monastery. [Gr. akoimetoi, sleepless, a, neg., and koimaein, to put to sleep.]
Acold, a-kōld′, adj. (arch.) cold. [A.S. acóled, pa.p. of acólian; pfx. a-, intens., and cólian, to Cool.]