monogenousadj.

1857 R. G. Mayne Expos. Lexicon Med. Sci. (1860) Monogenus, Bot., applied by Lessing to monocotyledonous plants, because they have but one surface of increase, which is central: monogenous.

1900 B. D. Jackson Gloss. Bot. Terms Monogenous = Endogenous.

1866 Reader 15 Sept. 796 One wild bird may have been the ancestor of all the fantails, another of all the carriers, and so on. Thus domestic pigeons may be said to be ‘monogenous’ as to their origin from one wild species, ‘polygenous’ as to the individual ancestor of each variety.

1890 Cent. Dict. Monogenous, of or pertaining to monogenism.

1900 Q. Jrnl. Econ. 14 206 Any considerable population, such as that of France, may be descended from some originally monogenous race group, or the various social classes within it may be so descended.

1955 Shakespeare Q. 6 315 McKerrow explains this process for such simple texts in what he calls the monogenous line of descent (i.e., one directly derived from another).

1870 Eng. Mech. 11 Feb. 524/1 Chlorine forms only one compound with hydrogen... Chlorine may, for this reason, be called a monogenous element.

1874 Amer. Naturalist 8 663 [Echinoderms.] We must..consider it irrelevant whether the nurse produces one or more germs (in a monogenous way).

1884 A. Sedgwick & F. G. Heathcote tr. C. Claus Elem. Text-bk. Zool.: Protozoa to Insecta 96 Reproduction by fission, which, with that by budding and spore-formation, is included under the term monogenous asexual reproduction.

1888 J. J. H. Teall Brit. Petrogr. 440 Monogenous, a word applied by some authors to clastic rocks the fragments of which are derived solely from one rock.

1890 Cent. Dict. Monogenous, having a single differential coefficient considered as a rule of generation.

1991 Proc. Royal Soc. A. 434 19 Monogenous functions of Borel, and quasianalytical functions of Gontchar.

1971 Nature 3 Sept. 54/2 There are three selective mechanisms..which may determine the degree of sex bias in a given population. These are selective mortality, unequal fertility potential of monogenous parents and selective mating.

1988 Jrnl. Heredity 79 184 The number of sex chromosomes in male and female larvae is discussed in relation to sex determination and the production of monogenous progenies.

1996 Crustaceana 69 455 The female- or male-biased sex ratio can be ascribed to the high proportion of monogenous pairs in which offspring sex ratio is significantly biased towards females..and/or..towards males.