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A cephalopod is a sea animal whose “feet” — the long arms, the tentacles — grow from around its head. An is one. A is one. A is one. They have a soft body, and many of them can change colour fast. The word lives in science class and nature films, not at the fish stall: there you just say or . Though actually, the Greek pieces mean “head-foot,” which sounds like a joke until you look at an . The mouth is in the middle, and the arms come out around it, as if the animal walks on its own head.
頭足類（章魚、魷魚這類）
組成From French céphalopode, from Ancient Greek κεφαλή (kephalḗ, “head”) + ποδός (podós), genitive of πούς (poús, “foot, leg”). By surface analysis, cephalo- (“head”) + -pod (“foot”).
原始詞典資料1 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
cephalopodnoun/ˈsɛfələˌpɒd/
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Any mollusc of the class Cephalopoda, which includes squid, cuttlefish, octopus, nautiloids etc.
- In terms of diversity, cephalopods include the egg case making argonauts, shelled nautiluses, venomous blue-ringed octopuses and enigmatic giants like the giant and colossal squid. […] Generally, cephalopod ink includes melanin, enzymes related to melanin production, catecholamines, peptidoglycans, free amino acids and metals (Derby 2014) .
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。