Word not found in any official scrabble dictionaries.
"Seax" Definition
noun
A curved one-edged sword or war-knife used by Germanic and Celtic peoples; specifically, the largest weapon of this sort, having a blade sometimes 20 inches in length.
Source: Century Dictionary
In heraldry, a bearing representing a weapon more or less like the above, but often approaching the form of a simitar, to distinguish it from which it is then engrailed at the back.
Source: Century Dictionary