fluor crown
noun
: a crown glass that contains fluorine, that has a low refractive index, and that is used especially for optical equipment
Word History
Etymology
fluor-
- supernormally
- supernova
- supernovae
- supernovas
- supernumeraries
- supernumerary
- supernumerary bud
- supernumerary rainbow
- supernutritions
- supero-
- superoctave
- superoctaves
- superorder
- superorders
- superordinal
- superordinary
- superordinate
- superordinated
- superordinates
- superordinatia
- superordinating
- superordination
- superordinations
- superorganicism
- superorganicist