D defs.my
Entry 1 sense Webster, 1913

Luke

/(lūk)/ · IPA /luːk/
01 a. Moderately warm; not hot; tepid; lukewarm.
  1. 1.
    Moderately warm; not hot; tepid; lukewarm.[Obs.]
    “Nine penn'orth o'brandy and water luke.” Dickens.