the irregular motion of small particles suspended in a liquid or a gas, caused by the bombardment of the particles by molecules of the medium: first observed by Robert Brown in 1827.
random movement of microscopic particles suspended in a fluid, caused by bombardment of the particles by molecules of the fluid. First observed in 1827, it provided strong evidence in support of the kinetic theory of molecules
a tiny, fanciful, good-natured brown elf who secretly helps at night with household chores. a small, chewy, cakelike cookie, usually made with chocolate and containing nuts. Australian. a bread with currants, baked in a camp oven. (sometimes initial capital letter) a member of the junior division of the Girl Scouts or the Girl Guides, being […]
noun a member of the Brownie Guides, one of the junior branches (aged 7–10 years) in The Guide Association
noun the adult leader of a pack of Brownie Guides Former name Brown Owl
a credit toward advancement or good standing gained especially by currying favor. noun a notional mark to one’s credit earned for being seen to do the right thing