lengths (of a pool), laps, bathtubs, tubs
A me piace nuotare delle vasche.
I like to swim laps.
How many laps did he swim?
Tom ha nuotato trenta vasche questa mattina.
Tom swam thirty lengths this morning.
Nello scantinato ci sono vasche da bagno usate per fare nitroglicerina.
In the basement there are bathtubs used to make nitroglycerin.
— Fight Club (1999)