"elegant cup or vase for drinking" (usually broad and shallow, with handles), 1873 (earlier in German), from Greek kylix "cup," which is similar to Latin calix "deep bowl, cup" (see chalice).

science of waves, 1906, from Greek kyma (genitive kymatos) "a wave" (from PIE root *keue- "to swell") + -ology. Related: Kymatological; kymatologist.

city in Japan, from kyo + to, both meaning "capital." Founded 794 as Heionkyo "Capital of Calm and Peace," it also has been known as Miyako and Saikyo. Kyoto Protocol so called because it was initially adopted Dec. 11, 1997, in the Japanese city.

"angular curvature of the spine," 1854 (in a translation from German, where it is attested by 1783), from Greek kyphos "crooked" + -osis.

also Kirghiz, Turkic people of western Central Asia, 1650s; their name is of disputed origin.

early 13c., a Greek liturgical formula adopted untranslated into the Latin mass, literally "lord have mercy" (Psalm cxxii.3; Matthew xv.22, xvii.15, etc.). From kyrie, vocative of kyrios "lord, master" (see church (n.)) + eleeson, aorist imperative of eleo "I have pity on, show mercy to," from eleos "pity, mercy" (see alms). Hence, the corresponding part of a musical setting of the Mass or Anglican Communion.