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WordNet-Online
Definitions from WordNet | ||||
Definitions from the WebUp QuarkPart of Speech: Noun Sense: In particle physics, an up quark is one of the six types of quarks. It carries a positive electric charge of +2/3 and is the lightest type of quark. Usage: Up quarks are essential building blocks of protons and neutrons, which are the basic constituents of atomic nuclei. Sample Sentence: Scientists at the LHC are studying the behavior of up quarks in order to understand the nature of matter at the subatomic level. | ||||
up in air up in sentences up in the air up in the collar up load up on up on predicate up predicate up quark up scale up set up the creek up the stairs up tight up to up to date up to date
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