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Noun
Biology .
- a membranous sac or integument.
- either of two strata of white matter in the cerebrum.
- the sporangium of various spore-producing organisms, as ferns, mosses, algae, and fungi.
Also called space capsule. Aerospace . a sealed cabin, container, or vehicle in which a person or animal can ride in flight in space or at very high altitudes within the earth's atmosphere.
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