un penetrant

penetrant

[pen-i-truhnt]
noun
1.
a person or thing that penetrates.
2.
a compound that penetrates the skin, as a lotion or cream.
3.
a substance that lowers the surface tension of water; wetting agent.
4.
Zoology. a large nematocyst discharging a barbed thread that penetrates the body of the prey and injects a toxic fluid.
adjective

Origin:
1535–45; < Latin penetrant- (stem of penetrāns), present participle of penetrāre to penetrate; see -ant

unpenetrant, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
penetrant (ˈpɛnɪtrənt)
 
adj
1.  sharp; penetrating
 
n
2.  chem a substance that lowers the surface tension of a liquid and thus causes it to penetrate or be absorbed more easily
3.  a person or thing that penetrates

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