What's the difference between bigamist and digamist?

Bigamist

Definition:

• (n.) One who is guilty of bigamy.

Example Sentences:

• (1) His own childhood was less happy - his father was a bigamist who fled to Canada, while his mother died when he was just 16.

Digamist

Definition:

• (n.) One who marries a second time; a deuterogamist.

Example Sentences: