plac·en·ta·tion (pl s  n-t  shn)n. 1. a. Formation of a placenta in the uterus. b. The type or structure of a placenta. 2. Botany Arrangement of placentas within the ovary. |
placentation [ˌplæsɛnˈteɪʃən]
n
1. (Life Sciences & Allied Applications / Botany) Botany the way in which ovules are attached in the ovary
2. (Life Sciences & Allied Applications / Zoology) Zoology
a. the way in which the placenta is attached in the uterus
b. the process of formation of the placenta
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. | placentation - the formation of the placenta in the uterus bodily function, bodily process, body process, activity - an organic process that takes place in the body; "respiratory activity" |
| 2. | placentation - arrangement of the ovules in the placenta and of the placentas in the ovary reproductive structure - the parts of a plant involved in its reproduction apical placentation - where one or few ovules develop at the top of a simple or compound ovary axile placentation - ovules are borne at or around the center of a compound ovary on an axis formed from joined septa basal placentation - where one or few ovules develop at the base of a simple or compound ovary free central placentation - where ovules develop on a central column in a compound ovary lacking septa or with septa at base only lamellate placentation - with ovules on thin extensions of the placentae into a compound ovary marginal placentation, ventral placentation - with ovules borne on the wall along the ventral suture of a simple ovary parietal placentation - where ovules develop on the wall or slight outgrowths of the wall forming broken partitions within a compound ovary |
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