What's the difference between gilse and grilse?

Gilse

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Definition:

• (n.) See Grilse.

Example Sentences:

Grilse

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Definition:

• (n.) A young salmon after its first return from the sea.

Example Sentences:

• (1) It was found to be a condition of parr in their second summer, but also occasionally of young adult fish (smolts and grilse) which have adapted to salt water.