[noun] A lion-dog or shrine dog; a guardianstatue seen in temples. Usually found in pairs, one on either side of an entryway, one with the mouth open to represent the syllable a or the start of things, and the other with the mouth closed to represent the syllable un or the end of things (similar to the phrase alpha and omega).
(This term, こまいぬ(komainu), is the hiragana spelling of the above term.)