sial
nounDefinition of sial
(Entry 1 of 2)
1 : siliceous or acid igneous rock whether solid or molten
2 : the lighter outer portion of the earth composed mainly of solid or molten rocks rich in silica and alumina — compare sima
sial-
combining formDefinition of sial- (Entry 2 of 2)
: saliva sialolith
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