Definitions

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

  • adj. Botany Having the shape of an arrowhead but with the basal lobes pointing outward at right angles: hastate leaves.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Of, or pertaining to a spear.
  • adj. Shaped similarly to a halberd, with pointed lobes pointed outward from the base.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Shaped like the head of a halberd; triangular, with the basal angles or lobes spreading.

from The Century Dictionary and Cyclopedia

  • Furnished with a sharp point or head for thrusting or cutting: said of a weapon, such as the spear, pike, partizan, or battle-ax.
  • Shaped like the head of a spear; specifically, in botany, triangular nearly down to the base, and then abruptly widened into two lateral lobes at right angles to the principal axis: said chiefly of leaves.
  • Also hastiform.

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

  • adj. (of a leaf shape) like a spear point, with flaring pointed lobes at the base

Etymologies

From Latin hasta, spear.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin hastātus ("armed with a spear"), from hasta ("spear") + -ātus. (Wiktionary)

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