monotropicadj.

1887 A. Cayley in Proc. London Math. Soc. 18 314 In order that a differential equation of the first order..may have a monotropic integral, the curve F(x,y) = 0 must satisfy certain conditions.

1891 G. L. Cathcart tr. A. Harnack Introd. Study Elem. Differential & Integral Calculus 128 The total course of a one-valued (monotropic) function is realised by help of two planes.

1897 W. D. Bancroft Phase Rule iii. 32 It is probable that the substances classified as ‘monotropic’ by Lehmann..are analogous to phosphorus.

1906 H. Marshall tr. P. H. von Groth Introd. Chem. Crystallogr. 26 It would probably be possible, by applying sufficient pressure to a monotrophic substance, to bring the transition point below the melting point, whereby the substance would change into an enantiotrophic one.

1924 A. E. Hill in H. S. Taylor Treat. Physical Chem. I. ix. 390 In other cases it is not easy to determine whether a given form is monotropic or enantiotropic.

1955 J. Zernike Chem. Phase Theory ii. 29 Cubic and hexagonal white phosphorus..are monotropic with respect to the violet form.

1994 Jrnl. Lipid Res. 35 2069 The monotropic transformation from the crystalline to the cholesteric phase occurs at 98 degree C.

1899 Bot. Gaz. 28 29 When a genus of plants has more than one closely allied species, the difference between a monotropic and an oligotropic bee may depend merely upon the accident that only one species occurs in the neighborhood.

1925 Ecology 6 412 Heriades truncorum, Panurgus calcaratus and Dasypoda hirtipes are ‘almost monotropic’ to B′.

1946 C. T. Brues Insect Dietary iii. 107 Numerous monotropic flower visitors are known where certain species of bees visit only a single species of plant.

1994 Proc. National Acad. Sci. U.S.A. 91 3 Plants pollinated by hymenopterans with species-specific or group-specific flower preferences for nutritive purposes (monotropic and oligotropic bees and fig wasps).

1966 Science 17 June 1636/3 Monotropic growth hormone deficiency was demonstrated in the two parents and one of the offspring.

1983 Clin. Reprod. & Fertility 2 229 Four women out of 242 experienced amenorrhoea in excess of 6 months duration following danazol treatment. Two of these exhibited an unusual monotropic rise of FSH.

1998 Jrnl. Clin. Endocrinol. & Metabolism 83 3302 An increase in activin A may contribute in part to the monotropic FSH increase in aging women.

1990 Proc. National Acad. Sci. U.S.A. 87 6577/1 Leu3A [sc. an anti-CD4 monoclonal antibody] also effectively blocked infection of monocyte/macrophages by two monotropic HIV-1 isolates.

1993 Jrnl. Med. Virol. 40 39 HEp-2 cells, human epithelial cells derived from a larynx carcinoma, were found to be highly susceptible to infection with HIV-1 strain IIIb and MN, but not to infection with the monotropic strain IIIBa-L.

1999 Stem Cells 17 327 The mechanisms by which HIV-1 affects thymopoiesis were determined by preincubating CD34+ cells or cultured thymic epithelial cells with lymphotropic and monotropic strains of HIV-1.