Definition

1. Noun:
   • The central vein of a leaf: The "midvein" is the primary, central vein running along the middle of a leaf blade, from the base to the apex. It is the main structural rib from which smaller veins typically branch out.

Usage Examples

• Noun:
  • The prominent midvein provides structural support to the large leaf.
  • Botanists often examine the midvein to help identify plant species.

Advanced Usage

• In botanical description: The term is used in technical descriptions of leaf morphology (phyllotaxy). The pattern of smaller veins branching from the midvein is called venation.
  • The leaf exhibits pinnate venation, with secondary veins branching off from a single midvein.

Variants and Related Words

• Midrib (noun): A common synonym for "midvein," often used interchangeably in botany.
  • The midrib was thick and fibrous.

Synonyms

• Midrib: The central rib of a leaf.
• Costa: A technical term, especially in descriptions of fern fronds or certain plant families.

Related Terms (Not Phrasal Verbs or Idioms)

• Venation (noun): The arrangement of veins in a leaf.
• Blade (noun): The broad, flat part of a leaf.

Noun

1. the vein in the center of a leaf