ogam Definition

ogam
ogham
noun

1a. An ancient alphabet, consisting of 20 or 25 characters, used from the 4c bc in Celtic and Pictish inscriptions, especially on stone monuments found in Ireland and Wales;
1b. Any of these characters, composed of sets of parallel lines (numbering one to five) meeting or crossing a base line, usually the corner of a stone monument.

Form: ogams (usually)
2. An inscription in this alphabet.

Derivative: ogamic
adj

Etymology: 18c: Irish Gaelic, perhaps related to Ogma, the mythical inventor of the alphabet.