In studies of vision and audition, stimuli can be systematically varied by wavelength and frequency, respectively, but there is no equivalent metric for olfaction. Restricted odorant-feature metrics ...

The metric prefixes mega, kilo, deci, centi, milli, micro are defined. Introduction to Chemistry - Metric Conversions: the metric prefixes mega, kilo, deci, centi, milli, micro are defined, and ...