Treated with or containing arsenic compounds; converted into an arsenate.
From arsenic + the suffix -eted (an archaic or technical variant of -ated, indicating a past action or state). This variant appears in older chemical and agricultural texts.
The spelling variation between 'arseneted' and 'arsenated' shows how chemical terminology was still being standardized in the 1800s—even scientists weren't sure which suffix sounded more 'scientific.'
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