From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.
Has"tate (?), Has"ta*ted, a. [L. hastatus, fr. hasta spear. Cf. Gad, n.]
Shaped like the head of a halberd; triangular, with the basal angles or lobes spreading; as, a hastate leaf.
© Webster 1913.
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