of first rank or importance or value; direct and immediate rather than secondary
most important element
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
of or being the essential or basic part
(astronomy) a celestial body (especially a star) relative to other objects in orbit around it
of primary importance
coil forming the part of an electrical circuit such that changing current in it induces a current in a neighboring circuit
