Abbreviation of 金烏玉兎 (きんうぎょくと), a classical Chinese-derived expression for the sun and moon. Extremely rare and literary; not used in everyday Japanese.
See also: 金烏玉兎
Extended literary use: the passage of time, years, or months, derived from the sun and moon imagery. Found only in classical or highly stylized writing.
烏兎 is an abbreviation of 金烏玉兎, an elegant term for the sun and moon.
In classical texts, expressions like 烏兎匆匆 convey the swift passage of time.
Common word for time or years; used in everyday contexts, whereas 烏兎 is restricted to classical literature.
Abbreviation of 金烏玉兎 (きんうぎょくと), a Chinese-derived phrase combining 金烏 (golden crow, symbol of the sun) and 玉兎 (jade rabbit, symbol of the moon). The exact historical derivation is uncertain, but the term is firmly rooted in classical East Asian cosmology.