Search and compare thousands of words and phrases in British Sign Language (BSL). The largest collection online.
How to sign: any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water
"bases include oxides and hydroxides of metals and ammonia";
Similiar / Same: alkali
How to sign: use as a basis for; found on
"base a claim on some observation";
Within this category: build