Possessing small keel-like ridges or projections; having a surface marked with fine keels.
From 'carinula' (small keel) plus the adjective suffix '-ate', describing something that bears small keel-like structures or ridges.
Under a microscope, seeds that appear smooth to the naked eye often reveal carinulate surfaces—delicate ridge patterns that help them grip soil particles and improve water absorption for germination.
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