Primary may refer to:
- Primary (astronomy), the larger of two co-orbiting bodies
- Primary mirror, principal light-gathering surface of a reflecting telescope
- Primary (band), from Australia
- Primary circuit, electrical circuit in a transformer that receives current, as opposed to secondary circuit
- Primary election, an election by which a political party selects and nominates a candidate
- Power line, electric power transmission line fed to or from a transformer
- Primary (film), 1960 documentary
- Primary (LDS Church), children's Sunday School organization
- "Primary" (song), by The Cure
- Primary, the oldest period in the Geologic time scale (obsolete)
- "Primary", a song by Spoon from the album Telephono
- Primaries, remiges (wing feathers) in birds
- Primaries or primary beams, in E. E. Smith's science-fiction series Lensman
- The first stage in a thermonuclear explosive, may also be used alone in a lower-yield nuclear explosive, see nuclear weapon design
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Famous quotes containing the word primary:
“Parental attitudes have greater correlation with pupil achievement than material home circumstances or variations in school and classroom organization, instructional materials, and particular teaching practices.”
—Children and Their Primary Schools, vol. 1, ch. 3, Central Advisory Council for Education, London (1967)
“If the accumulated wealth of the past generations is thus tainted,—no matter how much of it is offered to us,—we must begin to consider if it were not the nobler part to renounce it, and to put ourselves in primary relations with the soil and nature, and abstaining from whatever is dishonest and unclean, to take each of us bravely his part, with his own hands, in the manual labor of the world.”
—Ralph Waldo Emerson (1803–1882)
“Anyone who has obeyed nature by transmitting a piece of gossip experiences the explosive relief that accompanies the satisfying of a primary need.”
—Primo Levi (1919–1987)