SULPHINDIGOTIC a.
Of, pertaining to, or designating, a sulphonic acid obtained, as a blue solution, by dissolving indigo in sulphuric acid; -- formerly called also cerulic sulphuric acid, but properly called indigo-disulphonic acid.
SWELL v.
se the size, bulk, or dimensions of; to cause to rise, dilate, or increase; as, rains and dissolving snow swell the rivers in spring; immigration swells the population. [The Church] swells her high, heart-cheering tone. Keble.