An evil mastermind who attempts to take over the world.

(masonry) In bricklaying, an arrangement of bricks such that one course has the short sides of the bricks (headers) facing outwards, and the next course has the long sides of the bricks (stretchers) facing outwards.

(masonry) In bricklaying, an arrangement of bricks such that each course consists of alternate bricks having their short sides (headers) and long sides (stretchers) facing outwards, with alternate courses being offset.

(chemistry) A covalent bond in which three electron pairs (instead of the usual one) are shared between two atoms; most common between carbon atoms and carbon or nitrogen atoms, but a few other forms are known. Symbolized in formulae as ≡.

(chemistry) A covalent bond in which one electron pair is shared between two atoms.

(physical chemistry) A covalent bond in which two electron pairs (instead of the usual one) are shared between two atoms; most common between carbon atoms and carbon, oxygen or nitrogen atoms, but several other forms are known.

(US) A surety, used to obtain the release of a criminal defendant who has been required to give bail.

An insurance contract that covers an employer against loss due to fraudulent or dishonest employees.

(UK, finance) A method of financial investment available to British citizens where, instead of interest payments, investors have the chance to win tax-free prizes, or get their money back.

(chemistry) A weak bond in which a hydrogen atom in one molecule is attracted to an electronegative atom (usually nitrogen or oxygen) in the same or different molecule.