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

  • adjective Having three similar segments or parts.
  • adjective Botany Having flower parts, such as petals, sepals, and stamens, in sets of three.

from The Century Dictionary.

  • In botany, of three members; having the parts or members three in each cycle. Frequently written 3-merous.
  • In entomology: Divided into three joints; having three segments, as the tarsus of a beetle, thus:
  • Having the tarsi normally three-jointed, as a beetle; of or pertaining to the Trimera. Also trimeran.

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

  • adjective (Bot.) Having the parts in threes.

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

  • adjective botany Organized in threes; having parts in numbers that are multiples of three.


from Wiktionary, Creative Commons Attribution/Share-Alike License

From tri-, from Ancient Greek τρία (tri-, "three"); + Ancient Greek μέρος (meros, "part").



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