cotyledon

/,kɔti'li:dən/

Thân thiện

The seedling's first cotyledons emerge from the soil.

Definition

1. 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).

Học thuật

Noun

1. embryonic leaf in seed-bearing plants

Từ đồng nghĩa

• seed leaf