space mark
noun Printing.
a proofreader's symbol used to indicate the need to insert space, as between two typed or printed words that have been run together. Symbol: #
Origin of space mark
First recorded in 1885–90
Words nearby space mark
space inversion,
space junk,
space lattice,
space law,
space man,
space mark,
space medicine,
space opera,
space out,
space platform,
space probe