Squiggly Bit

An Australian Scientific slang that denotes the Precision Nanosystems microfluidic mixer, namely the junction where the two streams meet, commonly referred to as a Dean Vortex Bifurcating Toroidal Mixer - thus shortened to Squiggly bit.

The aqueous stream meets the solvent stream an passes through the squiggly bit in laminar flow conditions.

Squiggly Bits

The colored squiggly lines under questionable words in popular word-processing programs, used to highlight potential grammar or spelling errors.

I thought I'd spelled it correctly, but then I saw the squiggly bits and knew I'd misspelled it.