adjective

(of a plant or animal structure, e.g. a leaf) tapering to a point.

In place of these, we analyzed timing of anthesis, presence or absence of seed wings and pistillate racemes, and prevalence of acuminate leaf apices and attenuate leaf bases.

sharp,spearlike,needle-like,spear-shaped,V-shaped,tapering,tapered,cone-shaped,conic,conical,acute,sharp-cornered,wedge-shaped,sharp-edged,edged,jagged,spiky,spiked,barbed

adjective

(chiefly of crystals) needle-shaped.

The acicular crystals are sometimes intergrown or twinned, causing a distortion that results in seemingly single crystals with relatively fat bases tapering to pointed terminations.

sharp,spearlike,needle-like,spear-shaped,V-shaped,tapering,tapered,cone-shaped,conic,conical,acute,sharp-cornered,wedge-shaped,sharp-edged,edged,jagged,spiky,spiked,barbed