Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
agrĭcultor, ōris, m., better separately, agri cultor, an agriculturist, farmer, husbandman (in class. per. very rare): servos agri cultores rem publicam abduxisse, Liv. 26, 35; so Dig. 22, 3, 25, § 1.