Meanings

pyramid-style

formal cause (one of Aristotle's four fundamental types of answer to the question "why?")

Jersey cudweed (species of cottonweed, Gnaphalium affine)

convex polygon

acute (of the shape of a leaf tip)

concave polygon

lemniscate

isosceles right triangle

adjectival noun

euphonic change form

toy soldier

fundamental form

organizer (in vertebrate embryology)

conjunctive normal form

tree form

polymorphism

poetry form (esp. haiku)

comb-shaped

microtopography

chevron (in heraldry)