acicular

The American Dictionary and Cyclopedia · 1910 · p. 5

[From Lat. acicula (q.v.).] Needle-shaped. 1. Min.: A term applied to long, slender, and straight prismatic crystals. ( Phillips : Mineral., 2nd ed., p. lxxxiii.) Example, the crystals of titanite. 2. Bot . A term applied specially to leaves. (Loudon: Cyclopæd. of Plants, Glo ary .)