Optimum (adjective)

Most favorable or desirable; best.

Origin:

Derived from the latin word 'optimus' meaning 'best'.

Examples:

1. The optimum temperature for this type of plant is between 68 and 72 degrees Fahrenheit.
2. The optimum time to plant tomatoes is in late spring when the soil has warmed up.
3. The optimum amount of water for this type of flower is once a week.
4. The optimum way to cook this steak is medium rare.
5. The optimum solution to this problem would be to find a compromise that satisfies both parties.