Arrow-shaped

Wiktionary Word definitions in Wiktionary
a. 1 Of, or pertaining to a spear. 2 (context botany of leaves English) Shaped similarly to a halberd, with pointed lobes pointed outward from the base.

WordNet Word definitions in WordNet
adj. of a leaf shape; like a spear point, with flaring pointed lobes at the base [syn: spearhead-shaped ]

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Hastate \Has"tate\ (h[a^]s"t[asl]t), Hastated \Has"ta*ted\ (h[=a]s"t[asl]*t[e^]d), 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.