Initialism of British Society of Cinematographers. / Initialism of Better Sleep Council.

Sagacious in adapting means to ends; circumspect in action, or in determining any line of conduct. / Practically wise, judicious, shrewd. / Frugal, economical.

White, whitish, or greyish-white. / White or grey with age. / (zoology) Of a pale silvery grey. / (botany) Covered with short, dense, greyish white hairs. / (figuratively) Old or old-fashioned; trite.

(obsolete, chemistry) hydrogen