Noun
glass microspheres (used in reflective materials, typically < 100μm diameter)
ballotini (uncountable)
A style of glass with a helical pattern, made by caneworking.
(sciences) small beads (usually of glass, typically of 1-4mm diameter)
The 40cm fractionating column was packed with 3mm ballotini.
Synonym: glass beads
ballotini (uncountable)
A style of glass with a helical pattern, made by caneworking.