n.
Pronunciation: ˌ tr ī - ˌ ī - ə -d ō - ' th ī -r ə - ˌ n ē n
Function: noun
Etymology: tri- + iod- + thyronine an amino acid of which thyroxine is a derivative
Date: 1952
: an iodine-containing hormone C 15 H 12 I 3 NO 4 that is an amino acid derived from thyroxine