plagentation defined in 1951 yearplagentation - plagentation;
plagentation - (Bot.). Type of arrangement of placentas in a syn-carpous ovary; (a) parietal; carpels are fused only by their margins, placentas then appearing as internal ridges on ovary wall, e.g. violet; (b) axile; margins of carpels fold inwards, fusing together in centre of ovary to form a single, central placenta. Ovary is divided into as many compartments (loculi) as there are carpels, e.g., lily; (c) free central; placenta arising as a central upgrowth from ovary base, e.g. primrose. (Zool.). Type of arrangement of placenta in mammals.
near plagentation in Knolik
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