a. and sb. [f. prec. + -AN.]

1

  1.  adj. Of or pertaining to the ACEPHALA.

2

Mod.  An animal of the acephalan type…. One skilled in acephalan zoology.

3

  2.  sb. An animal of the division ACEPHALA.

4

1856.  Woodward, Man. Mollusca, 49. Viviparous reproduction … appears to take place in the acephalans.

5