noun
ADJECTIVE
▪ inner , inside , internal
▪
The tubes have an internal ~ of 2 mm.
▪ external , outer , outside
▪ large , small
VERB + DIAMETER
▪ calculate , determine , estimate , find , measure
▪
a method of calculating the ~ of the earth
▪ increase , reduce
▪ have
PREPOSITION
▪ in ~
▪
The mirror is ten inches in ~.