10 letters · 12 points in Scrabble
noun a small structural space between tissues or parts of an organ
noun small opening between things
originFrom late Middle English interstice, from Old French interstice or directly from Latin interstitium (“a space between, gap, interval”), ultimately from intersistere (“to stand in between, to stop in the middle”), from inter- + sistere (“to stand, to stop”).
Etymology from Wiktionary, CC BY-SA 3.0