|bärbə|tu̇rik-, |bȧb-, -ə.|tyu̇-, -t(y)ü-, -rēk- noun
Etymology: part translation of German barbitursäure, irregular from the name Barbara + German -ur- (from International Scientific Vocabulary uric ) + säure acid
: a crystalline acid CH 2 (CONH) 2 CO that is a derivative of pyrimidine and is usually obtained from malonic acid and urea; malonylurea ; also : any of the acids derived from this acid, many of them being used as hypnotics