scentlessness en · NOUN
Etymology
From scentless + -ness.
Meanings
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(uncountable) The state or condition of being scentless.
It must be, I think, that Nature has endowed the young of ground-nesting birds with a scentlessness which is a form of negative protection from their enemies - if one may use such a definition.
1934, Henry G. Lamond, An Aviary On The Plains, page 221: