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Definition of: ocrea
(ok′rē·ə, ō′krē·ə) noun plural oc·re·ae (ok′ri·ē, ō′kri·ē)
1. Bot. a A stipule or combined pair of stipules forming a legging-shaped sheath about the stem of a plant, b A thin sheath around the seta of a moss: erroneously written ochrea.
2. Ornithol. A sheath, as the boot of a bird. [<L, a legging, a greave]
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