coign
coign The top and bottom corners of a crystal when the crystal is held between thumb and forefinger in order to examine its symmetry elements. However, any three-dimensional ‘corner’ in a crystal, such as the corners of a cube, may be called a coign.
More From encyclopedia.com
Transuranium Elements , transuranium elements, in chemistry, radioactive elements with atomic numbers greater than that of uranium (at. no. 92). All the transuranium element… Examination , examinations. The first school examinations were held in the 16th and 17th cents., when diocesan visitations were made. Teachers were questioned on t… Physical Examination , Definition
A physical examination is the evaluation of a body to determine its state of health. The techniques of inspection, palpation (feeling with… Trace Elements , Trace elements, also sometimes called microminerals, are chemicals that are required by organisms in very small quantities for proper physiological a… Francium , Francium (revised)
Note: This article, originally published in 1998, was updated in 2006 for the eBook edition.
Overview
Francium is an alkali metal,… Essential Element , essential element Any of a number of elements required by living organisms to ensure normal growth, development, and maintenance. Apart from the elem…
You Might Also Like
NEARBY TERMS
coign