BRIMSTONE

[ 'brɪmst(ə)n , -stəʊn ]

■ noun

1》 archaic sulphur.

2》 a large butterfly, the male of which is bright yellow and the female greenish-white. [ Gonepteryx rhamni .]

Origin

OE brynstān , prob. from bryne 'burning' + stān 'stone'.