> as lemmas

1892 Amer. Naturalist 26 642 In each cell Maupas distinguishes between the (M) meganucleus.., which presides over nutrition and growth and divides by constriction, and the (m) micronucleus.., which presides over the preservation of the species.

1903 S. J. Hickson in E. R. Lankester Treat. on Zool. I. i. 372 (heading) The meganucleus (= macronucleus).

1930 H. G. Newth Marshall & Hurst's Junior Course Pract. Zool. (ed. 11) i. 7 [Paramecium] Both mega- and micro-nuclei first divide, then a transverse constriction appears on the surface of the animal, and deepens till the body is divided into two.

1963 G. A. Kerkut Borradaile & Potts's Invertebrata (rev. ed.) ii. 32 The meganucleus is capable of conducting by itself the normal vegetative existence of the individual.