The Collaborative International Dictionary of English v.0.48:

Anopla \An"o*pla\ ([a^]n"[o^]*pl[.a]), n. pl. [NL., fr. Gr.
   'a`noplos unarmed.] (Zool.)
   One of the two orders of Nemerteans. See Nemertina.
   [1913 Webster] Anoplothere