lanceolate
adjective
lan·ce·o·late ˈlan(t)-sē-ə-ˌlāt 
: shaped like a lance head
specifically : tapering to a point at the apex and sometimes at the base
lanceolate leaves
lanceolate prisms
see leaf illustration 
Word History
Etymology
Late Latin lanceolatus, from Latin lanceola, diminutive of lancea
First Known Use
circa 1760, in the meaning defined above
Medical Definition
lanceolate
adjective
lan·ce·o·late ˈlan(t)-sē-ə-ˌlāt
: shaped like the head of a lance or spear