Definitions

from The Century Dictionary.

  • In botany, having numerous centripetally developed xylem plates: said of some radial vascular cylinders.

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

  • noun rare Many rulers, many leaders.
  • noun sciences A root that has many xylem bundles.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Latin, from Ancient Greek πολύς (polus, "many") + ἀρχή (arkhē, "beginning").

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