Standard Lemma guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
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noun
The local fusion of the embryonic stage of an animal to its parent for physiological exchange to promote the growth and development of the young; involves a placenta in non-egglaying mammals.
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
Topics: biology, natural-sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
The manner in which the seeds are attached to the placenta within the ovary locules.
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
Topics: biology, botany, natural-sciences
Synonyms: none provided
Antonyms: none provided
noun
arrangement of the ovules in the placenta and of the placentas in the ovary
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
Broader terms: reproductive structure
Narrower terms: apical placentation, axile placentation, basal placentation, free central placentation, lamellate placentation, marginal placentation, ventral placentation, parietal placentation
noun
the formation of the placenta in the uterus
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
Broader terms: bodily process, body process, bodily function, activity
History
Etymology tree English placenta Proto-Indo-European *-tis Proto-Indo-European *-Hō Proto-Indo-European *-tiHō Proto-Italic *-tiō Latin -tiō Latin -ātiōlbor. Old French -ationbor. Middle English -acioun English -ation English placentation From placenta + -ation.
