An alternative spelling of agister; a person who provides agisting services for livestock.
A variant form of agister, using the -or suffix (similar to -er) which comes from Latin -or and creates agent nouns. Both -er and -or serve identical functions.
Medieval documents show both agister and agistor being used interchangeably in England—linguists call this 'morphological variation,' and it shows that even technical occupational terms weren't rigidly standardized before modern English.
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