Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Having three costae.

from The Century Dictionary.

  • In botany, having three ribs from the base; three-ribbed.
  • In zoology, having three costæ or raised lines.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective (Bot.) Three-ribbed; having three ribs from the base.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective Having three ribs.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

tri- +‎ costate

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