Vocabulary : Brachypinacoid to Brachyurous
Brachypinacoid : A plane of an orthorhombic crystal which is parallel both to the vertical axis and to the shorter lateral (brachydiagonal) axis.Brachyptera : A group of Coleoptera having short wings; the rove beetles.
Brachypteres : A group of birds, including auks, divers, and penguins.
Brachypterous : Having short wings.
Brachystochrone : A curve, in which a body, starting from a given point, and descending solely by the force of gravity, will reach another given point in a shorter time than it could by any other path. This curve of quickest descent, as it is sometimes called, is, in a vacuum, the same as the cycloid.