word-forming element meaning "of the skull," from Latinized combining form of Greek kranion "skull" (see cranium).

word-forming element meaning "deviating from the usual, abnormal," from Greek anomalos "uneven, irregular" (see anomaly).

word-forming element meaning "arterial," from Latinized form of Greek arteria "windpipe; artery" (see artery).

word-forming element meaning "political; political and," from Latinized combining form of Greek politikos (see political).

word-forming element used from mid-19c. and meaning "pus," from Greek puon "pus" (see pus).

"capable of being amused," 1829 (from 1817 as a French word in English), from amuse (v.) + -able.

word-forming element meaning "having a head" (of a specified type), from Greek kephalē "head" (see cephalo-).

"perform better than," 1915, an advertiser's word at first, from out- + perform. Related: Outperformed; outperforming.

1966, "at the higher end of a scale, superior," a commercial word, from up (adv.) + scale (v.3).

word-forming element referring to the environment and man's relation to it, abstracted from ecology, ecological; attested from 1969.