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flag,

n 1. a type of indicator used for identification.
2. a label that signals the occurrence of some medical condition (“red flag”).

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flag

see udder edema.

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flag

Lab medicine A determined value on a diagnostic test at or above which a certain action is taken; eg fasting glucose > 7.8 mmol/L–US: > 140 mg/dL, is a flag for notifying the attending physician, who might not otherwise suspect DM. See Decision level, Panic value, Red flag.