SynonymDefinitionAntonym.com - English Synonym Dictionary

A preliminary election where delegates or nominees are chosen

One of the main flight feathers projecting along the outer edge of a bird's wing

Coil forming the part of an electrical circuit such that changing current in it induces a current in a neighboring circuit

(astronomy) a celestial body (especially a star) relative to other objects in orbit around it

Of first rank or importance or value; direct and immediate rather than secondary

Of or being the essential or basic part

Most important element

Not derived from or reducible to something else; basic