節足(せっそく)動物(どうぶつ)

せっそくどうぶつ
noun
arthropod
1. arthropod; jointed-legged invertebrate
An invertebrate animal with a hard external skeleton and jointed legs. The group includes insects, spiders, crustaceans, and centipedes.
昆虫(こんちゅう)は節足(せっそく)動物(どうぶつ)だ。
Insects are arthropods.
エビやカニも節足(せっそく)動物(どうぶつ)だ。
Shrimp and crabs are also arthropods.
節足(せっそく)動物(どうぶつ)は地球上(ちきゅうじょう)で最(もっと)も種類(しゅるい)が多(おお)い動物(どうぶつ)のグループだ。
Arthropods are the most species-rich group of animals on Earth.

Composed of 節足(せっそく) (jointed legs) + 動物(どうぶつ) (animal). A biology term for invertebrates with a hard exoskeleton and segmented, jointed legs.

INCLUDES:

  • 昆虫(こんちゅう): insects
  • クモ: spiders
  • 甲殻類(こうかくるい): crustaceans

RELATED TERMS:

  • 無脊椎(むせきつい)動物(どうぶつ): invertebrate — the broader category to which 節足(せっそく)動物(どうぶつ) belongs
  • 外骨格(がいこっかく): exoskeleton — the hard outer covering of an arthropod
general
Added 2026.5.18 12:04
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