Word: sexless
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Dates: during 1940-1949
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Shapiro's feat is the latest development in the artificial parthenogenesis, or sexless reproduction, of mammals. Sexless reproduction occurs naturally among many insects and has long been induced by curious biologists in sea urchins and frogs. Fatherless mammals were first produced in 1939 by Dr. Gregory Pincus (now of Clark University), who artificially fertilized ova from doe rabbits by 1) a salt solution, 2) heat, 3) cold. The salt-fertilized eggs, with no contact at all from the male, were replanted in the does and gestated normally into healthy bunnies, themselves capable of sexual reproduction...
...Cryptogamic-i.e., devious in sexual behavior. As late as 1875 many scientists argued that some fungi were of spontaneous generation. So tiny and evasive were the winter spores of the potato fungus that they were not identified until 1910. Further, reproduction among fungi was usually sexless, with a sexual union occurring perhaps only once in several generations...