鰓嚢 さいのう Also written えらぶくろ Meanings Noun gill sac; branchial sac; branchial pouch; inner branchial groove; pharyngeal pouch Kanji 鰓 gills; gill slits. Read as サイ. 嚢 pouch; purse; bag. Read as ノウ. Jinuma: Japanese Dictionary · Word lists