protective

adjective
pro·tec·tive | \prə-ˈtek-tiv \

Medical Definition of protective 

(Entry 1 of 2)

: serving to protect the body or one of its parts from disease or injury a protective reflex

protective

noun

Medical Definition of protective (Entry 2 of 2)

: an agent (as a medicine or a dressing) that protects the body or one of its parts (as from irritation or injury) vitamins are protectives against certain deficiency diseases

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exaggeratedly or childishly emotional

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