say it: GAM-uh
gamma is a noun meaning "the 3rd letter of the Greek alphabet". It carries 3 recorded senses.
the 3rd letter of the Greek alphabet
a unit of magnetic field strength equal to one-hundred-thousandth of an oersted
Portuguese navigator who led an expedition around the Cape of Good Hope in 1497; he sighted and named Natal on Christmas Day before crossing the Indian Ocean (1469-1524)
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for gamma come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.