(music) Audible sounds below 60 Hz and extending downward to the lowest frequencies humans can hear, typically 20 Hz.

simple past tense and past participle of sub out

To remove from something or to have one's place taken, especially in sports.

Third-person singular simple present indicative form of sub out

present participle of sub out

Having an overall rectangular shape, but with rounded edges.

subleaser

substitutes' bench

A submarine tender.

A subordinate or secondary element.