n. pl. col·u·mel·lae (-mĕlē) Any small columnlike structure in various plants and animals, often forming the central axis of development for the organism or an anatomical structure. [Latin, diminutive of columna, column; see COLUMN.] col′u·mellar (-mĕlər) adj. col′u·mellate′ (-mĕlāt′) adj. |
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