Subscriber login
Password
Forgot your password?
Library card login
Login with Shibboleth® »
Login with Athens »
Close menu
Oxford Dictionaries Online
The world's most trusted dictionaries
About
Subscriber services
What's new
Contact us
Help
Subscribe now
Already a subscriber or in a subscribing organization?
Login
Dictionary
Other language resources
US English
World English
Dictionary
Better writing
World of words
Puzzles and games
For children and schools
For learners of English
Email
Cite
magmatism
(mag¦ma|tism)
noun
[
mass noun
]
Geology
the motion or activity of magma.
More words in this category
aseismic
colluvium
Cretaceous
Cromerian
Dalradian
devitrify
downwelling
emplacement
fluvioglacial
fumarole
grike
incised meander
interfluve
outwash
residual
serac
shatter cone
silicic
spallation
Torridonian
Nearby Words
magisterial
magisterium
magistracy
magistral
magistrate
Maglemosian
maglev
magma
magma chamber
magmatism
Magna Carta
magna cum laude
Magna Graecia
magnanimity
magnanimous
magnate
magnesia
magnesian
magnesite