The Collaborative International Dictionary
Epithema
Epithema \Ep`i*the"ma\, n. [NL., from Gr. 'epi` upon + ? a case, box, fr. ? to place.] (Zo["o]l.) A horny excrescence upon the beak of birds. [1913 Webster] ||
Wiktionary
epithema
n. (context zoology English) A horny excrescence upon the beak of birds.