op•ti•mum
Pronunciation: (op'tu-mum), [key]
— n., pl. adj. -ma -mums,
—n.
- the best or most favorable point, degree, amount, etc., as of temperature, light, and moisture for the growth or reproduction of an organism.
- the greatest degree or best result obtained or obtainable under specific conditions.
—adj.
- most favorable or desirable; best: optimum conditions.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.