spherule
Minuscule round body
A spherule is a small sphere or spherical body.
The term appears in scientific contexts—geology, astronomy, metallurgy—where tiny rounded particles matter: volcanic spherules in the ash layer, metallic spherules from the impact site.
The word emphasizes both the shape and the diminutive size.
Pierced ornament for threading
- globuleSmall spherical drop
- pelletSmall rounded mass
- dropletTiny liquid sphere
- particleMinute piece of matter
granule · microbead · microsphere · nanosphere · colloidal · emulsion · aerosol · spore
Solidified volcanic ash
- pyroclasticHot eruption debris
- volcanicOf fiery mountain origin
- impactForceful contact or consequence
- ejectaMaterial forcibly discharged
accretionary · concretion · silica · glass · obsidian · perlite · tephra · ash
Minute extraterrestrial surface grain
- interplanetaryBetween celestial bodies
- extraterrestrialBeing from outer space
- meteoriticOf space rock origin
- cometaryOf frozen celestial bodies
asteroid · ablation · bolide · fireball · accretion · protoplanetary
bead
Pierced ornament for threading
particle · granule · microbead · microsphere · nanosphere · colloidal · emulsion · aerosol · spore · pollen
tuff
Solidified volcanic ash
- pyroclasticHot eruption debris
- volcanicOf fiery mountain origin
- impactForceful contact or consequence
ejecta · accretionary · concretion · silica · glass · obsidian · perlite · tephra · ash · pumice
micrometeorite
Minute extraterrestrial surface grain
- interplanetaryBetween celestial bodies
- extraterrestrialBeing from outer space
- meteoriticOf space rock origin
cometary · asteroid · ablation · bolide · fireball · accretion · protoplanetary
sphere, spherical, hemisphere, spheroid, spheric, spherically, hemispherical