"engrossed mentally," 1760, past-participle adjective in a figurative sense from absorb (v.). Related: Absorbedly.

also air-tight, "impermeable to air," 1760, from air (n.1) + tight. Figurative sense of "incontrovertible" (of arguments, alibis, etc.) is from 1929.

"exalt to godhood, deify," 1760; see apotheosis + -ize. Related: Apotheosized; apotheosizing. Earlier in same sense was apotheose (1670s).

"quality of being authentic, or entitled to acceptance as true or correct," 1760, from authentic + -ity. Earlier were authentity (1650s), authenticness (1620s).

"state or condition of being between; intermediate condition," 1760, a jocular formation, perhaps coined by Horace Walpole, from between + -ity.

"the bite of a bug," or the swelling and irritation caused by it, 1760, from bug (n.1) + bite (n.).

"rough sound of the letter -r-" (especially that common in Northumberland), 1760, later extended to "northern accented speech" in general. Possibly the sound of the word is imitative of the speech peculiarity itself, or it was adapted from one of the senses of bur (q.v.), perhaps from the phrase to have a bur in (one's) throat (late 14c.), which was a figure of speech for "feel a choking sensation, huskiness." OED says the Scottish -r- is a lingual trill, not a true burr.

"something of little value but externally attractive and made to sell quickly," 1760, from catch (v.) + penny (n.). It will catch a penny. Also as an adjective.

also cinque-cento, "the sixteenth century" (in reference to Italian art and literature), 1760, from Italian cinquecento, literally "500," short for mil cinquecento "1500." See cinque + hundred, and compare quattrocento. Also as an adjective.

"cup-shaped," applied especially to the socket of the hip joint, 1760, from Latinized form of Greek kotyloeides "cup-shaped," from kotylē "bowl, dish, small cup," in transferred use, "socket of the hip-joint," a word of uncertain origin, + -oeidēs (see -oid).