- a combining form borrowed from Greek, where it meant “fat”, used with this meaning, and with reference to stearic acid and its related compounds, in the formation of compound words: stearoptene; stearoyl.
Also especially before a vowel, stear-.
Origin of stearo-
combining form representing Greek stéar fat, grease; cf. steato-
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018