obtuse leaf

Học thuật
Thân thiện
Definition

Noun: A simple leaf (a leaf not divided into separate leaflets) characterized by having a rounded or blunt tip, rather than a pointed or sharp one.

Usage

This is a specific botanical term used to describe the shape of a leaf's apex (tip). It is used in scientific descriptions, field guides, and botanical studies.

Examples
  • The plant was identified by its obtuse leaves, which lacked a pointed tip.
  • In the dichotomous key, the characteristic "obtuse leaf" helped distinguish this species from its relatives.
  • Botanists noted that the obtuse leaf morphology was consistent across the population.
Advanced Usage
  • Comparative Description: The term is often used in contrast to "acute leaf" (pointed tip) or "acuminate leaf" (tapering to a long, fine point).
    • The specimen had obtuse leaves, while the similar-looking species had distinctly acute ones.
Variants and Related Words
  • Obtuse (adjective): In a general sense, means blunt or not sharp. In geometry, an angle greater than 90° and less than 180°.
  • Leaf apex: The tip of a leaf, where terms like obtuse, acute, acuminate, emarginate, etc., are applied.
  • Simple leaf: A leaf with a single, undivided blade, as opposed to a compound leaf.
Synonyms
  • Blunt-tipped leaf
  • Rounded leaf (though "rounded" can sometimes imply a more circular shape than merely a blunt tip)
Antonyms
  • Acute leaf
  • Acuminate leaf
  • Pointed leaf
Noun
  1. a simple leaf having a rounded or blunt tip