hair space

English Thesaurus

1. (printing) the narrowest of the spaces used to separate words or letters (noun.artifact)

hypernym	:	quad, space,
definition	:	(printing) a block of type without a raised letter; used for spacing between words or sentences (noun.artifact)

domain category	:	printing, printing process,
definition	:	reproduction by applying ink to paper as for publication (noun.communication)