D

Alphabetical index

deca

Prefix for a multiple of 10, symbol: da.

deci

Prefix for a subdivision of 0.1 or 1/10, symbol: d.

decimal

Reference to the number base of ten, or a fractional number represented by digits to the right of a decimal marker.

decimal marker

UK (and US) practice is to use a full stop (period or dot) on the line as the decimal marker.

Whole numbers should be expressed without a decimal marker.

When a number is less than one, the decimal marker should be preceded by a zero.

degree Celsius

Unit of measurement of temperature, symbol: ^oC.

degree (plane angle)

Unit of measurement of plane angle, non-SI but accepted for use with SI, symbol: ^o.