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Webster 1913 Edition

Placentation

Placˊen-ta′tion

,
Noun.
1.
(Anat.)
The mode of formation of the placenta in different animals;
as, the
placentation
of mammals
.
2.
(Bot.)
The mode in which the placenta is arranged or composed;
as, axile
placentation
; parietal
placentation
.

Webster 1828 Edition

Placentation

PLACENTA'TION

,
Noun.
In botany, the disposition of the cotyledons or lobes in the vegetation or germination of seeds.

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