The term DECIMAL BASE is used to describe a system of numbers that uses the base 10, or decimal, system. The crossword solutions for this term are TEN (3 letters), TENS (4 letters), DEWEY (5 letters), ONES (4 letters), TENTH (5 letters), and MANTISSA (8 letters). TEN refers to the number 10, which is the base of the decimal system. TENS refers to the group of 10 numbers that make up the base of the decimal system. DEWEY is a reference to Melvil Dewey, who developed the decimal classification system. ONES refers to the individual numbers that make up the decimal system. TENTH is a fraction of the decimal system, which is one TENTH of a whole number. MANTISSA is the part of a decimal number after the decimal point.