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单词 actinal
释义

Definition of actinal in English:

actinal

adjective akˈtʌɪnlˈaktɪnl
Zoology
  • Designating the part or surface of an echinoderm or other radiate animal which contains the mouth and surrounding organs (as the lower or oral side of a starfish); relating to this part.

Origin

Mid 19th century; earliest use found in Louis Agassiz (1807–1873), zoologist and geologist. From ancient Greek ἀκτῖν-, ἀκτίς ray + -al.

Definition of actinal in US English:

actinal

adjective
Zoology
  • Designating the part or surface of an echinoderm or other radiate animal which contains the mouth and surrounding organs (as the lower or oral side of a starfish); relating to this part.

Origin

Mid 19th century; earliest use found in Louis Agassiz (1807–1873), zoologist and geologist. From ancient Greek ἀκτῖν-, ἀκτίς ray + -al.

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更新时间:2025/6/18 6:01:32