reniform leaf
- noun
- /ˈrɛnɪfɔrm liːf/
- Specialized
- The common violet often has a reniform leaf, which helps in its identification.
Examples
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A reniform leaf is broader than it is long, resembling the shape of a kidney.
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Botanists distinguish the reniform leaf from other shapes, such as lanceolate or ovate.
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Look at this reniform leaf!
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The reniform leaf is beautiful.
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A reniform leaf has a unique shape that makes it easily identifiable in many plant species.
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The reniform leaf of the kidney bean plant contributes to its common name and distinguishes it from others.
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In botany, a reniform leaf is specifically described as having a kidney-like shape that is broad and rounded.
Surface Forms
Morphology
The adjective 'reniform' literally means 'kidney-shaped', so when combined with the noun 'leaf' the phrase directly denotes a leaf shaped like a kidney. This is a straightforward adjective + noun composition following normal descriptive patterns (and similar constructions exist cross-linguistically), so a B1 learner who knows both constituents can infer the meaning.
Etymology
The plant name reniform leaf comes from a word meaning 'kidney' and gives a clear picture: the part reniform means 'kidney' and the leaf looks like a small kidney. That's why it means 'kidney-shaped'.