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| phylum of worms with bilateral symmetry and soft, usually flattened bodies |
| major grouping of small-to-microscopic pseudocoelomate organisms |
carina ca·ri·na (kə-rī'nə, -rē'-)
n. pl. ca·ri·nae (-nē)
A keel-shaped ridge or structure, such as the ridge on the under surface of the fornix of the brain.