amphitropous
Definition
- Adjective: (of a plant ovule) partly inverted; turned back 90 degrees on its stalk. This describes the specific orientation of an ovule within a plant's ovary, where the ovule's body is bent so that the micropyle (the opening for pollen) is positioned near the funiculus (the stalk attaching it to the ovary wall).
Usage
This is a highly specialized botanical term. It is used almost exclusively in scientific contexts, such as plant morphology, taxonomy, and botanical descriptions, to classify and describe the structure of ovules.
Examples
- Adjective:
- The ovule of the lily is amphitropous, with its body curved sharply.
- Botanists distinguish between orthotropous, anatropous, and amphitropous ovule types.
- An amphitropous ovule orientation is common in certain plant families.
Advanced Usage
- Comparative Description: The term is often used in contrast to other ovule types like (completely inverted) or (straight and upright).
- Unlike the anatropous ovule, the amphitropous ovule is only partially inverted.
Variants and Related Words
- Amphitropy (n): The state or condition of being amphitropous.
- Amphitropy is one of several possible ovule orientations.
Synonyms
- Partially inverted: (General descriptive synonym in a botanical context).
Antonyms
- Anatropous: (Describes an ovule that is completely inverted).
- Orthotropous: (Describes an ovule that is straight and upright, not inverted).
Adjective
-
(of a plant ovule) partly inverted; turned back 90 degrees on its stalk
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