Tril"i*thon (tr&icr;l"&icr;*th&ocr;n), n.; pl. Trilithons
(#) [NL., fr. Gr. of or with three stones; (see Tri-) + stone.] Archaeol.
A monument consisting of three stones; especially, such a monument forming a
kind of doorway, as among the ancient Celts. See Stonehenge.
© Webster 1913.