John, 1724–92, English engineer.
adjective, Physical Chemistry. (of liquid crystals) 1. noting a mesomorphic state in which the arrangement of the molecules is in layers or planes. adjective 1. (chem) (of a substance) existing in or having a mesomorphic state in which the molecules are oriented in layers Compare nematic See also liquid crystal
noun, Mineralogy. 1. montmorillonite. noun 1. any of a group of clay minerals of which montmorillonite and saponite are members
noun (Scot) 1. any fine powder 2. spirit or mettle; vigour
noun 1. a male given name.