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Definition: Y term cyffredinol am y labeli a bennir i bobl ar sail ystod o nodweddion gan gynnwys cromosomau, proffiliau hormonau a nodweddion corfforol (ee organau rhyw). Gwryw a benyw (neu ddyn a menyw) yw'r labeli deuaidd traddodiadol ar ryw.
Notes: Cymharer รข'r diffiniad o gender / rhywedd.
