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| hy·droid [ h dròyd ] (plural hy·droids) |
noun |
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| Definition: |
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1. invertebrate sea animal: an invertebrate sea animal with an internal body cavity that lives in colonies, forming growths like tufts. Order Hydroida.
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2. polyp: an asexual polyp that is part of the life cycle of hydrozoans
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| [Mid-19th century. <hydra] |
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