Akademik
chalazoidite
\\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
Useful english dictionary
.
2012
.