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down

phys. The flavor of quark that has a charge of − 1/3 and a mass about 10 times that of an electron, belongs to the first generation of elementary fermions, […]

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Down’s syndrome

biol. A clinical condition of humans caused by an extra copy of chromosome 21 (trisomy 21) named after the physician (John) Langdon Haydon Down (1828-96), who made the first detailed […]

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downrange

phys. Being in the designated path from a launch pad to the point on a course generally taken as the target. འཕེན་ས་ནས་དམིགས་འབེན་དབར་གྱི་ལམ་ཐག

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