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 Meaning of NISUS
| Pronunciation: |  | 'nIsus 
 
 |  |  WordNet Dictionary |  |  |  |  | Definition: |  | [n]  an effortful attempt to attain a goal |  |  |  |  | Websites: |  |  |  |  |  |  | Synonyms: |  | pains, strain, striving |  |  |  |  | See Also: |  | attempt, effort, endeavor, endeavour, try |  |     |  |  Webster's 1913 Dictionary |  |  |  |  | Definition: |  | 
\Ni"sus\, n. [L., fr. niti, p. p. nisus, to strive.]
A striving; an effort; a conatus.
      A nisus or energizing towards a presented object.
                                               --Hickok.
\Ni"sus\, n. (Physiol.)
(a) The periodic procreative desire manifested in the spring
    by birds, etc.
(b) The contraction of the diaphragm and abdominal muscles to
    evacuate feces or urine.
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