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pinnate

Having a leaf or similar structure divided into leaflets that are arranged on either side of a common axis, resembling a feather. / Having a feather-like arrangement of parts, such as the vanes of a bird's feather or the rays of a fin.
Adjective

This term is primarily used in botanical and zoological contexts to describe a specific geometric arrangement. It evokes the image of a feather, where smaller elements branch off a central stem or axis. In botany, it specifically refers to compound leaves where leaflets are paired along a rachis.

Because it is a technical descriptor, it is rarely encountered in casual conversation and is almost exclusively found in scientific descriptions, field guides, or academic texts. It is distinct from "palmate," where leaflets radiate from a single point like the fingers of a hand.

Meanings

Adjective

Having a leaf or similar structure divided into leaflets that are arranged on either side of a common axis, resembling a feather.

The fern is characterized by its pinnate leaves.

Adjective

Having a feather-like arrangement of parts, such as the vanes of a bird's feather or the rays of a fin.

The pectoral fin of certain fish species exhibits a pinnate structure.

Examples

The ash tree is known for its pinnate leaves.

The ash tree is known for its pinnate leaves.

Look at this fern frond and notice how the leaflets are pinnate.

Look at this fern frond and notice how the leaflets are pinnate.

School Life

The specimen exhibits a clearly pinnate venation pattern.

The specimen exhibits a clearly pinnate venation pattern.

Trivia

I wonder if this rare plant has a pinnate or palmate leaf structure.

The fish has a pinnate fin that helps it navigate through the current.

The fish has a pinnate fin that helps it navigate through the current.

The professor explained that pinnate leaves are common in the legume family.

The professor explained that pinnate leaves are common in the legume family.

School Life

The delicate, pinnate foliage of the mimosa plant folds when touched.

The delicate, pinnate foliage of the mimosa plant folds when touched.

This particular species of bird has a pinnate arrangement of vanes on its primary feathers.

This particular species of bird has a pinnate arrangement of vanes on its primary feathers.

Trivia

The fossil shows a primitive pinnate leaf from the Carboniferous period.

History

Related Words

Última actualización: May 2026Reportar un error