noun, plural expectancies.
the quality or state of expecting; expectation; anticipatory belief or desire.
the state of being expected.
an object of expectation; something expected.
Also, expectance.

1590–1600; < Medieval Latin ex(s)pectantia. See expectant, -ancy

expectancy, expectation.
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World English Dictionary
expectancy or expectance (ɪkˈspɛktənsɪ)
1.  something expected, esp on the basis of a norm or average: his life expectancy was 30 years
2.  anticipation; expectation
3.  the prospect of a future interest or possession, esp in property: an estate in expectancy
expectance or expectance

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

c.1600, from L. expectantem (see expectant) + -ancy.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Average life expectancy, today at an all-time high, could in our generation
  increase ten more years.
At the court this night there is an air of expectancy among the nobles.
Already, people predict that this new generation's life expectancy may be lower
  than the previous.
These adjustments will take increased life expectancy into account, since
  beneficiaries will need to be supported longer.
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