- (palynology) Characterized by a fastigium, a cavity separating the intexine from the sexine near the endoaperture of a colporate pollen grain.
"The grains are 3-colporate and fastigiate."
- (botany, horticulture) Having closely-bunched erect parallel branches
"This is a fastigiate variety."
- (botany) Erect and parallel
"The branches of this species are fastigiate."
- (obsolete) Tapering to a point
- (horticulture) A tree or shrub with erect, parallel branches.