cotyledon
/,kɔti'li:dən/
Definition
- Noun:
- Embryonic leaf in seed-bearing plants: A cotyledon is the first leaf or one of the first pair of leaves to appear from a germinating seed. It is part of the embryo within the seed and often contains stored food for the young plant.
Usage Examples
- Noun:
- A bean seed has two large cotyledons that provide nutrients to the sprouting plant.
- Botanists classify flowering plants based on whether they have one or two cotyledons in their seeds.
Advanced Usage
- "Cotyledon stage": Refers to the early phase of a seedling's growth when the cotyledons are visible and functional.
- The plant is most vulnerable during the cotyledon stage.
Variants and Related Words
- Cotyledonary (adj): Of or relating to a cotyledon.
- The cotyledonary tissue provides initial nourishment.
Synonyms
- Seed leaf: A common, descriptive synonym for cotyledon.
- Embryonic leaf: A more technical synonym emphasizing its origin.
Different Meanings
- This term is highly specific to botany and seed biology. It does not have common idiomatic or figurative meanings outside this scientific context.
Notes
- The term is central to plant classification. Monocotyledons (monocots) are plants with one seed leaf (e.g., grasses, lilies). Dicotyledons (dicots) are plants with two seed leaves (e.g., beans, roses).
Noun
-
embryonic leaf in seed-bearing plants
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