elementary : Idioms & Phrases
elementary education
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noun education in elementary subjects (reading and writing and arithmetic) provided to young students at a grade school
WordNet
elementary geometry
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noun (mathematics) geometry based on Euclid's axioms
Euclidean geometry; parabolic geometry.
WordNet
elementary particle
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noun (physics) a particle that is less complex than an atom; regarded as constituents of all matter
fundamental particle.
WordNet
elementary school
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noun a school for young children; usually the first 6 or 8 grades
grade school; primary school; grammar school.