heaven and earth; yin and yang; positive and negative
Obsolete term for the dual cosmic principles in Chinese philosophy, encompassing the complementary forces of heaven/earth, yin/yang, or positive/negative. Not used in modern Japanese outside historical or philosophical contexts.
両儀 is an old word referring to the fundamental principles of heaven, earth, yin, and yang found in the I Ching.
From Chinese 兩儀 / 两仪 (liǎngyí), literally 'two modes' or 'two principles', referring to the dual cosmic forces in Chinese philosophy. The exact historical derivation is uncertain; the spelling is conventionally associated with these meanings.