ˈkaləˌzȯiˌdīt, ˌ ̷ ̷ ̷ ̷ˈ ̷ ̷ ̷ ̷ noun
( -s )
Etymology: Greek chalaza hailstone + English -oid + -ite
: a spherical body formed during some volcanic eruptions by concentric accretion of pumiceous dust upon a pellet of mud blown into the air from the volcano