Rack of Test Tubes

A descriptive term referring to the homogeneous architecture of optimal parallel orientation of normal colonic glands, fancifully likened to test tubes; loss of this homogeneity is typical of inflammatory bowel disease seen by light microscopy at low power
References in periodicals archive ?
The fastest way to fill a rack of test tubes is to line them up in a row, dispensing 5 mL into each tube.
It's hard to sympathise with characters who have all the colourless charm of a rack of test tubes.