SINCE 1828
sial
noun
si·al
| \ ˈsīˌal\
plural -s
Definition 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 form
variants:
or sialo-
Definition of sial- (Entry 2 of 2)
: saliva
sialolith
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