nebenkernn.

1885 Science 3 July 5 Nussbaum divided a well-isolated Oxytricha into two equal parts... By the following day, the two parts converted themselves into complete animals with four nuclei and nucleoli (nebenkerne).

1895 G. W. Field in Jrnl. Morphol. 11 237 In view of the fact that the term ‘Nebenkern’ has come to be applied to many sorts of intracellular structures..it seems best, since the history of the middle piece or ‘Nebenkern’ is now better understood, that this noncommittal term..should be replaced by some term which gives a hint as to the nature of this body.

1901 G. N. Calkins Protozoa i. 14 He [sc. Bütschli] held..that in addition to the macronucleus there is a second and a smaller nucleus in Infusoria, and to this he gave the name Nebenkern or micronucleus ('76).

1928 E. L. Opie in E. V. Cowdry Special Cytol. I. ix. 246 The name ‘nebenkern’ or ‘paranucleus’ has been given to structures situated within the cytoplasm [of the pancreatic acinous cell] and staining like nuclear material... Other chromatin-like bodies designated ‘nebenkerne’ are spherical and have an even contour.

1958 Internat. Rev. Cytol. 7 223 In other invertebrates..the mitochondrial nebenkern is transformed into a spiral wrapping that extends for the greater part of the length of the sperm tail.

1969 Science 21 Feb. 822/2 The abnormal membrane masses appear initially to be associated with the nucleus, resembling the ‘nebenkerne’ found in various conditions of cell pathology.

1985 Gamete Res. 11 421 At the later stages of nucleus formation..the vesicles of the endoplasmic reticulum that penetrate between the Nebenkern and the larger part of the nucleus, play a certain role.

1994 Proc. National Acad. Sci. U.S.A. 91 10752/1 Mutant defects in spermatogenesis include the presence of micronuclei and abnormally large nebenkerns in early spermatids.