interspace

Etymology

inter- + space

noun

1. A space or interval between two things; an interstice
   It is the object of the mechanical atomistic philosophy to confound synthesis with synartesis, or rather with mere juxtaposition of corpuscles separated by invisible interspaces. 1818 [1809–10], Samuel Taylor Coleridge, The Friend, footnote; republished as “Essay XIII”, in The Friend: A Series of Essays, London: Bell & Daldy, 1867, page 55
   Tess sat up in bed, lost in a vague interspace between a dream and this information. 1891, Thomas Hardy, Tess of the d'Urbervilles, volume 1, London: James R. Osgood, McIlvaine and Co., page 49
   In a review of over 1000 interdigital clavuses, 65% were found in the fourth interspace […] 1988, Shepard R. Hurwitz, Foot and Ankle Pain, page 331

verb

1. (transitive) To place (things) spaced out between other things.
2. (transitive) To sow or seed (an area) with things spaced out between other things.
   When such species as European larch, white pine, or black walnut are widely spaced, in order to promote the most rapid growth, it may be advisable to interspace the area with some more tolerant and slower-growing species. 1916, Bulletin of the U.S. Department of Agriculture, numbers 151-175, page 18