optimum
UK: ˈɒptɪməm | US: ˈɑːptɪməm
n. the most favorable or advantageous condition, degree, or amount
adj. most conducive to a favorable outcome; best
The word optimum originates from Latin optimus ("best"), reflecting the superlative form of bonus ("good"). It entered English in the 19th century, retaining its core meaning of "the best or most favorable condition." The suffix -um preserves its Latin neuter form, often used in scientific or technical contexts to denote an ideal state.
The plants grew best at the optimum temperature of 25°C.
To achieve optimum results, follow the instructions carefully.
The engine performs at its optimum efficiency under these conditions.
Researchers are still determining the optimum dosage for the vaccine.
His health improved when he maintained an optimum balance of diet and exercise.