word-forming element meaning "hidden, covered," from Latinized form of Greek kalyptos "covered," from kalyptein "to cover, conceal," from PIE root *kel- (1) "to cover, conceal, save."
word-forming element meaning "tumor," from Latinized form of Greek kele "tumor, rupture, hernia," from PIE *kehul- "tumor" (source also of Old Norse haull, Old English heala "groin rupture," Old Church Slavonic kyla, Lithuanian kūlas "rupture").
before vowels chem-, word-forming element denoting "relation to chemical action or chemicals," from combining form of chemical (adj.), used to form scientific compound words from c. 1900. In 19c., chemico- was used.