a Triton's trumpet (Charonia tritonis) shell used in ancient times as a horn to signal troop movements

a Japanese cockle, an egg cockle: an edible marine bivalve mollusc of family Cardiidae, species Fulvia mutica

cone snail, cone shell (Conidae)

Kyūjitai form of 内臓 (“internal organ; viscera”).

Kyūjitai form of 内心: inner thoughts, real intentions

a nautilus

Alternative spelling of 内腔

Kyūjitai form of 体内 (“the inside of the body”)

Kyūjitai form of 内核 (“inner core”)

Kyūjitai form of 内毒素 (“endotoxin”)