‖n.; pl. Gonothec&unr_; [ NL., fr. Gr. &unr_; offspring + &unr_; box. ] (Zool.) A capsule developed on certain hydroids (Thecaphora), inclosing the blastostyle upon which the medusoid buds or gonophores are developed; -- called also gonangium, and teleophore. See Hydroidea, and Illust. of Campanularian. [ 1913 Webster ]