A Dictionary of the Older Scottish Tongue (up to 1700)
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First published 2002 (DOST Vol. XI).
This entry has not been updated since then but may contain minor corrections and revisions.
Trigram, n. [Gk. τρι three and γράμμα line, letter, or γραμμή stroke, line.] An inscription of three letters. —1606 Birnie Kirk-b. xii.
Inscryuing their tombes with a trigram of D.M.S. a diton that meaned Diis manibus Sacrum … this tombe is consecrate holy to the graue gods
