内ない臓ぞう弓きゅうMeanings1nounvisceral archAnatomical term for the embryonic structures that develop into the jaw and gill arches in vertebrates.内ない臓ぞう弓きゅうは脊せき椎つい動どう物ぶつの発はっ生せい過か程ていで顎あごや鰓さい弓きゅうに分ぶん化かする。The visceral arches differentiate into the jaw and gill arches during vertebrate development.