無脊椎動物 むせきついどうぶつ Meanings Noun invertebrate; invertebrates; invertebrata See also: 脊椎動物 (せきついどうぶつ). Kanji 無 without. Read as ム. 脊 spine. Read as セキ. 椎 vertebra. Read as ツイ. 動 move. Read as ドウ. 物 thing. Read as ブツ. Word lists Zoology Jinuma: Japanese Dictionary · Word lists