concavo-convex


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concavo-convex

[kän¦kāv·ō·kän′veks]
(science and technology)
References in periodicals archive ?
Achene 1.3-1.6 mm long, 0.9-1.1 mm wide, dark brown, obovate to elliptic-obovate, flattened-trigonous to more or less plano-convex or even slightly concavo-convex, rounded to more or less cuneate to a sessile base, rounded to the apex, with an indistinct collar and sometimes a very short apiculus, finely papillose; style branches reddish, feathery with elongate papillae.
However, the upper Khatkiara Member displays tight packing (concavo-convex grain contacts) and significant mechanical compaction.