the height of lower case letters of a typeface, without ascenders or descenders
x-height in American English
(ˈeksˌhait)
noun
Printing
the height of a lowercase x
Derived forms
x-high (ˈeksˈhai)
adjective
Word origin
[1945–50]This word is first recorded in the period 1945–50. Other words that entered Englishat around the same time include: RNA, individual medley, on-line, regression analysis, shootout