Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Divided pinnately nearly to the midrib. Used of certain leaves.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Having lobes with incisions that extend almost, or up to midrib.

from The Century Dictionary and Cyclopedia

  • In botany, pinnately divided; cut quite down to the midrib, but with the segments not articulated. Also pinnatisected.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. (of a leaf shape) cleft nearly to the midrib in narrow divisions not separated into distinct leaflets

Etymologies

From New Latin pinnatisectus, from Latin pinnatus ("feathered") + sectum, past participle of seco ("to cut") (Wiktionary)

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