The term 'BASIC METRIC WEIGHT' is a measurement system used to measure the WEIGHT of an object. The term is composed of two words, 'BASIC' and 'metric'. The word 'BASIC' refers to the fundamental units of measurement, while the word 'metric' refers to the system of measurement used in the metric system. The word 'WEIGHT' refers to the amount of mass an object has. The crossword solution for this term is 'GRAM', which is a unit of mass in the metric system. A GRAM is equal to one thousandth of a kilogram, and is the base unit of mass in the International System of Units.