testa


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tes·ta

(tes'tă),
1. In protozoology, usually termed test; an envelope of certain forms of ameboid protozoa, consisting of various earthy materials cemented to a chitinous base (as in the testate rhizopods of the subclass Testacealobosia) or the calcareous, siliceous, organic, or strontium sulfate skeletons in the rhizopod subclass Foraminifera.
2. In botany, the outer, sometimes the only, coat of a seed.
[L. shell]

testa

[tes′tə]
Etymology: L, a shell
1 an eggshell.
2 powdered oyster shells used in antacids.
3 the outer coat of a seed.

tes·ta

(tes'tă)
1. In protozoology, usually termed test; an envelope of certain forms of ameboid protozoa, consisting of various early materials cemented to a chitinous base (as in the testate rhizopods of the subclass Testacealobosia) or the calcareous, siliceous, organic, or strontium sulfate skeletons in the rhizopod subsclass Foraminifera.
Synonym(s): test (6).
2. In botany, the outer, sometimes the only, coat of a seed.
[L. shell]

testa

a protective coat around the seed, formed from the INTEGUMENTS of the OVULE. At one area on the testa is the hilum, at one end of which is often found the MICROPYLE. Sometimes the testa is responsible for seed dormancy, a state which is broken when the coat ruptures (see GERMINATION).
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The study, by actuary Richard Bergstrom of Milliman & Robertson and Ernie Testa of Atset Consulting Group, was sponsored by Calypte Biomedical Corp.
The White-Spot Testa Color genetic stock has a predominantly red testa color, with a small singular white spot located on the opposite end of the seed from the hilum.
Testa of the University of Alaska in Fairbanks has monitored changes in population in a seal community in the Antarctic, just offshore from Ross Island where the National Science Foundation supports a research center.
com), the world's leading supplier of data loggers, today announced that Justin Testa has been hired as the company's new president.