Of, pertaining to, or located at a base, but especially at the base of the skull or an organ of Corti.
Lower, inferior, base.
Related to a foundation. base, or basis; serving as a foundation.
essential; extremely important
The lowest frequency of a periodic waveform.
A main or major principle, rule, law, etc. which serves as the foundation or basis of a system; an essential part
The lowest partial of a complex tone.