lanceolate

adj

1. Having the general shape of a lance; much longer than wide, with the widest part lower than the middle and a pointed apex.
2. Of a class of knapped stone points, made without a stem, shoulders, notches, or other features that aid in attachment to a shaft.

   “The stone tools in these levels include Still Bay points, beautifully shaped thin lanceolate spear points, flaked on both sides.”

noun

1. Any such artefact.