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The thing first formed; that of which there are subsequent copies or reproductions; the original.

The reproduction of a part which has been removed or destroyed; re-formation; -- a process especially characteristic of a many of the lower animals; as, the regeneration of lost feelers, limbs, and claws by spiders and crabs.

Tending, or pertaining, to reproduction; employed in reproduction. Lyell.

A combining form denoting division or cleavage; as, schizogenesis, reproduction by fission or cell division.

reproduction by fission. Haeckel.

Reproduction by fission.

ion in certain Protozoa. See Spore formation, belw. Spore formation. (a) (Biol) A mode of reproduction resembling multitude fission, common among Protozoa, in which the organism breaks up into a number of pieces, or spores, each of which eventually develops into an organism like the parent form. Balfour.…

An asexual zooid, usually forming one of a series of larval forms in the agamic reproduction of various trematodes and other parasitic worms. The sporocyst generally develops from an egg, but in its turn produces other larvæ by internal budding, or by the subdivision of a part or all of its contents into a number of mi…

reproduction by spores.

Incapable of reproduction; unfitted for reproduction of offspring; not able to germinate or bear fruit; unfruitful; as, a sterile flower, which bears only stamens.

odified to serve many of the functions of the above-named organs. Both asexual and sexual reproduction, often of a complex type, occur in these forms. The Thallophyta exist almost exclusively as gametophytes, the sporophyte being absent or rudimentary. By those who do not separate the Myxophyta from the Tallophyta as a…

-- a name applied by modern composes for the piano to a more or less fanciful and ornate reproduction on their own instrument of a song or other piece not originally intended for it; as, Listzt's transcriptions of songs by Schubert.

A zooid of the third generation in asexual reproduction.

nch of lithography in which impressions from printers' types are transferred to stone for reproduction. -- Ty`po*lith`o*graph"ic (#), a.

, consisting of a simple or branched mass of cellular tissue, or educed to a single cell. Reproduction effected variously. Divided into Algæ, which contain chlorophyll or its equivalent, and which live upon air and water, and Fungi, which contain no chlorophyll, and live on organic matter. (Lichens are now believed to…

The sexual reproduction of animals.

nt of a proposed class or grand division (Zygophytes, Zygophyta, or Zygosporeæ), in which reproduction consists in the union of two similar cells. Cf. Oöphyte.