(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 type of covalent bond where the two electrons being shared originate from the same atom; a dative bond.

(chemistry) A type of chemical bond where two atoms or molecules are connected to each other by electrostatic attraction.

(chemistry) An amide bond formed between the amino and carboxyl functional groups of separate amino acids. / (biochemistry) The primary linkage of amino acids in proteins.

(chemistry) A type of chemical bond where two atoms are connected to each other by the sharing of two or more electrons.

(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.

(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 ≡.

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

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