parabasaln.adj.

1872 H. A. Nicholson Man. Palæontol. 125 In some cases the ‘basals’ are succeeded by a second row or cycle of plates..which are sometimes regarded as something special, and are termed the ‘parabasals’ or ‘sub-radials’.

1884 Philos. Trans. 1883 (Royal Soc.) 174 932 (note) This name [sc. sub-radial] was give by de Koninck to the so-called parabasals of Müller.

1915 Proc. National Acad. Sci. U.S.A. 1 552 The so-called ‘Rätzelkörper’ are homologues of the parabasals of the trichomonads.

1938 Trans. Royal Soc. Trop. Med. & Hygiene 32 333 In referring to the prominent dark-staining structure at the base of the flagellum in trypanosomes, I have at one time used the term parabasal, later changing to kinetonucleus, while the name kinetoplast has been employed to denote the complex kinetonucleus (or parabasal) + blepharoplast (or basal granule).

1904 in N.E.D. Parabasal.

1912 E. A. Minchin Introd. Study Protozoa vi. 89 The ring of blepharoplasts in Lophomonas is supported on the edge of a membranous structure,..which in its turn is surrounded by a peculiar striated body, the ‘collar’ of Grassi, or ‘parabasal apparatus’ of Janicki.

1924 R. W. Hegner & W. H. Taliaferro Human Protozool. v. 127 Most of the members of the genus [Trypanosoma] are characterized by the possession of a more or less spindle-shaped body, a central nucleus, and a spherical or rod-shaped parabasal body, with which is closely associated a small blepharoplast and a flagellum.

1961 D. L. Mackinnon & R. S. J. Hawes Introd. Study Protozoa ii. 101 The term parabasal body (unfortunately applied at times to the structure just defined as a kinetoplast) is here reserved for an organelle best seen in the Trichomonadida... It is more complex than the kinetoplast, usually compound, F −, and rarely if ever completely preserved except by ‘cytological’ fixatives. It is not self-reproducing.

1987 M. S. Laverack & J. Dando Lect. Notes Invertebr. Zool. (ed. 3) i. 6/2 Kinetoplast (parabasal body), genetically autonomous, membrane-limited organelle associated with the basal body of certain flagellate Protozoa.

2001 European Jrnl. Cell Biol. 80 593 The Golgi in trichomonads is a prominent structure, associated with striated parabasal filaments to which this organelle seems to be connected.

1948 G. N. Papanicolaou et al. Epithelia of Woman's Reproductive Organs ix. 38 The parabasal postpartum cells..show a greater variety in size and form, somewhat larger nuclei, extensive vacuolization, and a tendency to congregate into larger groups.

1960 Obstetr. & Gynecol. 16 407/2 Deep in the layers of the epithelia are the parabasal cells, which cover the basal germinal layer of cells and are characterized by dense, thick cytoplasm with vesicular nuclei.

1985 A. McPherson Cervical Screening 30 During the childbearing years..most of the cells seen in cervical smears come from the superficial zone of the squamous epithelium. There are several types: superficial squamous cells, intermediate squamous cells, and parabasal cells.

1999 Proc. National Acad. Sci. U.S.A. 96 11334/1 This conclusion is strongly supported by the location of sunburn/apoptotic keratinocytes in the basal (proliferative) or parabasal layer of reconstructed epidermis.