1560s, "pertaining to a cone," also "having the form or shape of a cone," from conic + -al (1). As a type of map projection, from 1827. Related: Conically.
Entries linking to conical
conic adj.
1560s, "pertaining to a cone;" 1610s, "having the form of a cone," from Modern Latin conicus, from Greek konikos "cone-shaped," from konos (see cone).
-al 1
suffix forming adjectives from nouns or other adjectives, "of, like, related to, pertaining to," Middle English -al, -el, from French or directly from Latin -alis (see -al (2)).