Secondary is an adjective meaning "second" or "second hand". It may refer to:
Secondary (chemistry), term used in organic chemistry to classify various types of compoundsThe group of (usually at least four) defensive backs in gridiron footballAn obsolete name for the Mesozoic in geosciencesThe secondary winding, or the electrical or electronic circuit connected to the secondary winding in a transformerSecondary emission, the phenomenon where primary incident particles of sufficient energy, when hitting a surface or passing through some material, induce the emission of secondary particlesSecondary electrons, electrons generated as ionization productsSecondary color, color made from mixing primary colorsSecondary craters, often called "secondaries"Secondary consumers in ecology Trophic dynamicsSecondary dominant in musicSecondary educationSecondary school – The type of school at the secondary level of educationSecondary market, an aftermarket where financial assets are tradedSecondary mirror, second mirror element/focusing surface in a reflecting telescopeSecondaries, the second-largest group of remiges (wing feathers), which attach to the inner lower arm referenceEver curious about what that abbreviation stands for? fullforms has got them all listed out for you to explore. Simply,Choose a subject/topic and get started on a self-paced learning journey in a world of fullforms.
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