placentation
Definition
Noun: 1. The arrangement of ovules within the placenta and of placentas within the ovary of a flowering plant. This is a botanical term describing the structure and positioning of seed-bearing parts. 2. The formation and attachment of the placenta in the uterus of a mammal during pregnancy. This is a biological term describing a key developmental process.
Usage and Examples
- Botany: "The study of placentation helps botanists classify different plant families."
- Biology/Zoology: "The placentation in humans is of the hemochorial type, allowing for direct contact between maternal blood and fetal tissues."
Advanced Usage
- Types of Placentation (Botany): Specific terms describe different arrangements, such as (ovules attached to a central column) or (ovules attached to the ovary wall).
- Types of Placentation (Biology): Described by the intimacy of contact between maternal and fetal tissues, e.g., , , .
Variants and Related Words
- Placenta (n): The primary organ involved in both definitions.
- Placental (adj): Relating to or having a placenta.
Synonyms
- Botany: Ovule arrangement.
- Biology: Placental formation, implantation (in a broader embryonic context).
Noun
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arrangement of the ovules in the placenta and of the placentas in the ovary
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the formation of the placenta in the uterus
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