As defined by A Concise Dictionary of Old Icelandic (Geir Zoëga):
- m. the third part; aukast þriðjungi, to be increased by a third.
Possible runic inscription in Younger Futhark:ᚦᚱᛁᚦᛁᚢᚾᚴᚱ
Also available in related dictionaries:
This headword also appears in dictionaries of other languages closely related to Old Icelandic.