| sphaerenchyma | <botany> Vegetable tissue composed of thin-walled rounded cells, a modification of parenchyma. Origin: NL, fr. Gr. Sphere + -enchyma as in parenchima. Source: Websters Dictionary (01 Mar 1998) |
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| sphaeriales | An order of ascomycetous fungi which includes many economically important plant parasites as well as saprophytes. (12 Dec 1998) |
| sphaeridium | <marine biology, zoology> A peculiar sense organ found upon the exterior of most kinds of sea urchins, and consisting of an oval or sherical head surmounting a short pedicel. It is generally supposed to be an olfactory organ. Origin: NL, fr. Gr. A sphere. (20 Mar 1998) |
| sphaerospore | <botany> One of the nonsexual spores found in red algae; a tetraspore. Origin: Gr. Sphere + E. Spore. Source: Websters Dictionary (01 Mar 1998) |
| sphaerulite | <chemical> Same as Spherulite. Source: Websters Dictionary (01 Mar 1998) |