mammal - млекопитающее

mammal (n.) (англизированная форма современного латинского «Mammalia» (Линней); из позднелатинского «mammalis» - от груди; из латинского «mamma» - грудь
1826, anglicized form of Modern Latin Mammalia (1773), coined 1758 by Linnaeus for the class of mammals, from neuter plural of Late Latin mammalis "of the breast," from Latin mamma "breast," perhaps cognate with mamma.

mamma (n.) (мама, грудная молочная железа); имитация детского лепета
1570s, representing the native form of the reduplication of *ma- that is nearly universal among the Indo-European languages (Greek mamme "mother, grandmother," Latin mamma, Persian mama, Russian and Lithuanian mama "mother," German Muhme "mother's sister," French maman, Welsh mam "mother"). Probably a natural sound in baby-talk, perhaps imitative of sound made while sucking.

Просто «мама» + «лижу»