Having no ribs; lacking ribs (in various senses).
单词 | θ21162 |
释义 | the world > plants > part of plant > part defined by form or function > ridge channel > [adjective] > not having ribs (2) ribless1777 Having no ribs; lacking ribs (in various senses). unkeeled1848 Botany and Zoology. Of part of a plant or animal: not having a central ridge along its convex surface. Cf. keel, n.1 4. |
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