I. ˈlak-ˌtāt noun
Date: circa 1794
: a salt or ester of lactic acid
II. intransitive verb
( lac·tat·ed ; lac·tat·ing )
Etymology: Latin lactatus, past participle of lactare, from lact-, lac
Date: circa 1889
: to secrete milk
• lac·ta·tion lak-ˈtā-shən noun
• lac·ta·tion·al -shnəl, -shə-n ə l adjective