[1] : The Collaborative International Dictionary of English v.0.48

space \space\, v. t. imp.  p. p. spaced; p. pr.  vb. n.
   spacong. cf. f. espacer. see space, n. print.
   to arrange or adjust the spaces in or between; as, to space
   words, lines, or letters.
   1913 webster
see also:
spaced spacong space 

[2] : WordNet (r) 2.0

spaced
     adj 1: spaced apart syn: separated
     2: arranged with spaces between; often used as a combining
        form; "widely spaced eyes" ant: unspaced
see also:
separated unspaced 

Spaced >> S Words
Spaced, definition of term: Spaced
spaced_pag1.html