古

horses 4 or more years old (usu. in racing)

convention; usage; old customs; old etiquette

dictionary of archaisms

old method

old music

last year's tea

unmatched in history; unequaled in history

ancient poems

old manuscript; codex

Paleozoic era

best ever

classics; classical studies

extinct plants and animals

historical document written without a particular addressee (e.g. a diary)

old tradition

paleontologist

traditional (folk) song

old name; former name

ancient human skeleton; archaeological human remains

ancient character (esp. Chinese); ancient writing

old English

ancient rice varieties; wild rice

old shrine

scrap iron; scrap metal