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4 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 ni·sus /ˈnaɪsəs/

From: DICT.TW English-Chinese Medical Dictionary 英漢醫學字典

 ni·sus /ˈnaɪsəs/ 名詞

From: Webster's Revised Unabridged Dictionary (1913)

 Ni·sus n.
 1. A striving; an effort; a conatus.
    A nisus or energizing towards a presented object.   --Hickok.
 2. 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.

From: WordNet (r) 2.0

      n : an effortful attempt to attain a goal [syn: striving, pains,