pinnate

/'pinit/ Cách viết khác : (pinnated) /'pinitid/

Thân thiện

The fern has a long, delicate pinnate leaf.

Definition

1. Adjective:
   • Featherlike in structure; having leaflets arranged on each side of a common central axis (rachis): This term is primarily used in botany to describe a compound leaf where smaller leaflets are arranged in two rows along the sides of a central stem, resembling the structure of a feather.

Usage Examples

• Adjective:
  • The ash tree has pinnate leaves with several pairs of leaflets.
  • Botanists identified the plant by its pinnate leaf structure.
  • A pinnate venation pattern is common in many ferns.

Advanced Usage

• "Odd-pinnate" or "Imparipinnate": A pinnate leaf ending with a single terminal leaflet, resulting in an odd total number of leaflets.
  • The rose plant typically has odd-pinnate leaves.
• "Even-pinnate" or "Paripinnate": A pinnate leaf ending with a pair of leaflets, resulting in an even total number of leaflets.
  • The leaves of the honey locust are even-pinnate.
• "Bipinnate": A leaf that is twice pinnate; the primary leaflets (pinnae) are themselves divided into smaller pinnate leaflets.
  • The mimosa tree has delicate bipinnate leaves.

Variants and Related Words

• Pinnated (adj): An alternative form of 'pinnate', having the same meaning.
  • The pinnated leaves were clearly visible.
• Pinnately (adv): In a pinnate manner.
  • The leaflets are pinnately arranged.
• Pinnation (n): The condition or arrangement of being pinnate.
  • The degree of pinnation varies among species.

Synonyms

• Featherlike: Resembling a feather in form.
• Pinnated: Having leaflets arranged on each side of a stalk.

Antonyms

• Simple: (Of a leaf) not divided into separate leaflets.
• Palmate: (Of a leaf) having leaflets or lobes radiating from a single point, like the fingers of a hand.

Related Terms (Not Phrasal Verbs)

• Leaflet: A small leaf-like part of a compound leaf.
• Rachis: The central axis or stem of a pinnate leaf or frond.
• Frond: The leaf or leaf-like part of a fern, palm, or similar plant, which is often pinnate.

Học thuật

Adjective

1. (of a leaf shape) featherlike; having leaflets on each side of a common axis

Từ đồng nghĩa

• pinnated