Medical Dictionary
hard
adj \ˈhärd\
Medical Definition of HARD
1
: not easily penetrated : not easily yielding to pressure
2
a of liquor : strongly alcoholic; specifically : having an alcoholic content of more than 22.5 percent b : characterized by the presence of salts (as of calcium or magnesium) that prevent lathering with soap <hard water>
3
: of or relating to radiation of relatively high penetrating power <hard X-rays>
4
a : physically fit <in good hard condition> b : resistant to stress (as disease)
5
: being at once addictive and gravely detrimental to health <such hard drugs as heroin>
6
: resistant to biodegradation <hard detergents> <hard pesticides like DDT>
—hard·ness noun
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