scrim
n.— «“Scrims” were a new word to me. They are shallow areas of gently flowing water (the water comes out from one side and drains at the opposite side). These are only about 1/8-inch deep, shallower than the sole of a shoe. Besides the fun of walking through the scrims (and having dry shoes in a few steps), was just watching the patterns of reflections change over the course of a minute or two. The water flow increases and decreases in a regular rhythm, causing the reflection of the canopy to blur and then become distinct.» —“Two Old Dogs’ New Trick” by Eileen Doughty Ragged Cloth Cafe, serving Art and Textiles Dec. 2, 2007. (source: Double-Tongued Dictionary)