[og-uh
m, aw-guhm] 
| 1. | an alphabetical script used originally for inscriptions in an archaic form of Irish, from about the 5th to the 10th centuries. |
| 2. | any of the 20 characters of this script, each consisting of one or more strokes for consonants and of notches for vowels cut across or upon a central line on a stone or piece of wood. |
| 3. | an inscription employing this script. |
| og·ham or og·am (ŏg'əm, ō'əm) n.
[Irish Gaelic, from Old Irish ogom, after Ogma, name of a Celtic god; see ag- in Indo-European roots.] |