Orthos can refer to:
*
''Orthos'' (skipper), a genus of butterfly in the grass skipper family
*
Orthos (Thessaly), a city of ancient Thessaly, Greece
* A two-headed dog in Greek mythology, also known as
Orthrus
In Greek mythology, Orthrus ( grc-gre, Ὄρθρος, ''Orthros'') or Orthus ( grc-gre, Ὄρθος, ''Orthos'') was, according to the mythographer Apollodorus, a two-headed dog who guarded Geryon's cattle and was killed by Heracles. He was the ...
See also
*
Orthros
''Orthros'' (Greek: , meaning "early dawn" or "daybreak") or ''Oútrenya'' ( Slavonic Оўтреня), in the Byzantine Rite of the Eastern Orthodox Church and the Eastern Catholic Churches, is the last of the four night offices (church services) ...
, the matins service in Eastern Christianity
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