What does acuminate mean?
The definition of acuminate
A*cu”mi*nate, a.
Etym: [L. acuminatus, p. p. of acuminare to sharpen, fr. acumen. See Acumen.]

Tapering to a point; pointed; as, acuminate leaves, teeth, etc.

A*cu”mi*nate, v. t.
To render sharp or keen. [R.] “To acuminate even despair.” Cowper.
A*cu”mi*nate, v. i.
To end in, or come to, a sharp point. “Acuminating in a cone of prelacy.” Milton.