optimum

[op-tuh-muhm]
noun, plural optima [op-tuh-muh] , optimums.
1.
the best or most favorable point, degree, amount, etc., as of temperature, light, and moisture for the growth or reproduction of an organism.
2.
the greatest degree or best result obtained or obtainable under specific conditions.
adjective
3.
most favorable or desirable; best: optimum conditions.

Origin:
1875–80; < Latin: noun use of neuter of optimus best, suppletive superlative of bonus good


3. ideal, perfect, optimal.
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World English Dictionary
optimum (ˈɒptɪməm)
 
n , pl -ma, -mums
1.  a condition, degree, amount or compromise that produces the best possible result
 
adj
2.  most favourable or advantageous; best: optimum conditions
 
[C19: from Latin: the best (thing), from optimus best; see optimism]

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Etymonline
Word Origin & History

optimum
1879, from L. optimum, neut. sing. of optimus "best" (used as a superl. of bonus "good"), probably related to ops "power, resources" (in which case the evolution is from "richest" to "the most esteemed") or to ob "in front of," with superlative suffix *-tumos. Originally in biology, in ref. to "conditions
most favorable" (for growth, etc.).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Any advice for optimum seats would be greatly appreciated.
It's also ideal for shortening your earphones to optimum length.
One optimum application for concentrating solar energy is to cool.
The search for the optimum equilibrium has to be a never-ending process of
  trial and error.
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