"parturition, delivery in childbed," 1803, from French accouchement, noun of action from accoucher "go to childbed" (see accoucheur). The verb accouche (1867) is a back-formation, or else from French accoucher.

1803, from aesthetic (adj.); also see -ics.

"common naturally occurring calcium phosphate," 1803, with -ite (1) + Greek apatē "cheating, fraud, deceit," which is of uncertain origin. Named by German geologist Abraham Gottlob Werner (1786) and so called because it often is mistaken for other minerals.

1803, "the doctrine that animals below man are devoid of consciousness;" see automaton + -ism. By 1856 as "automatic or involuntary action."

"capability of advantageous use," 1803, from available + -ity.

"having two heads," 1803, a hybrid from bi- + Latinized adjectival form of Greek kephalē "head" (see cephalo-) + -ous. Bicephalic in the same sense is by 1863.

"frank and simple good nature," 1803, from French bonhomie "good nature, easy temper," from bonhomme "good man" (with unusual loss of -m-), from bon "good" (see bon) + homme "man," from Latin homo "man" (see homunculus). The native equivalent to bonhomme is goodman. Bonhomme as "member of an order of begging friars" is from 1620s.

"confer brevet rank upon," 1803, from French breveter, from brevet (see brevet (n.)). Related: Breveted; breveting.

1803, "the practice or exercise of brutality," from brutal + -ism. In the arts, 1953 in reference to a style characterized by deliberate crudity and exposed structure. Brutalist is from 1934 in literature.

"offensively assertive," 1803, probably a jocular slang coinage from bump on the pattern of fractious, etc. Related: Bumptiously; bumptiousness.