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The Collaborative International Dictionary
Acephalan

Acephalan \A*ceph"a*lan\, n. Same as Acephal.

Acephalan

Acephalan \A*ceph"a*lan\, a. (Zo["o]l.) Belonging to the Acephala. [1913 Webster] ||

Wiktionary
acephalan

a. (context zoology English) Belonging to the Acephala. n. acephal