a. Zool. [f. as prec. + -OUS.] = prec.
1870. Rolleston, Anim. Life, xxxiv. 105. The fresh-water congeners of marine species which go through metamorphoses, are very frequently ametabolous in the sub-kingdoms of Mollusca.
1877. Huxley, Anat. Inv. Anim., vii. 424. Of ametabolous insects, there are some with masticatory, others with suctorial mouths.
