runcinate

/'rʌnsinit/

Thân thiện

The dandelion's runcinate leaves form a rosette on the ground.

Definition

Adjective: - Having incised margins with the lobes or teeth pointing toward the base: A botanical term used to describe a type of leaf shape where the leaf margin is deeply cut into sharp, backward-pointing lobes or teeth, with the tips of these divisions oriented toward the base of the leaf.

Usage Examples

• Adjective:
  • The dandelion is easily identified by its runcinate leaves.
  • Botanists classify certain leaf shapes as runcinate based on the orientation of the lobes.

Advanced Usage

• Technical Botanical Description: The term is almost exclusively used in formal botanical contexts to classify and describe specific leaf morphology. It is a precise descriptor for leaves that appear jagged with divisions that point backward, toward the stem.
  • The species key noted that the plant could be distinguished by its runcinate leaf margins.

Variants and Related Words

• Laciniate (adj): Slashed or cut into narrow, pointed lobes. (This is a related botanical term but does not specify the backward orientation of runcinate).
• Pinnatifid (adj): Cleft or divided in a pinnate (feather-like) manner, but not necessarily with lobes pointing toward the base.

Synonyms

• Retrorsely toothed: A more descriptive phrase meaning "with teeth pointing backward."
• Backward-pointing lobed: A non-technical paraphrase of the meaning.

Antonyms

• Forward-pointing: Having lobes or teeth oriented toward the apex (tip) of the leaf.
• Entire: Having a smooth, uncut leaf margin without teeth or lobes.

Học thuật

Adjective

1. having incised margins with the lobes or teeth pointing toward the base; as dandelion leaves