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
mass number
(mass num¦ber)
noun
Physics
the total number of protons and neutrons in a nucleus.
More words in this category
background
bioacoustics
collider
delta rays
density
EMF
energize
ESR
group velocity
Kelvin scale
Meissner effect
nematic
nucleosynthesis
PNdB
power
scalar field
semiconducting
spark chamber
stable equilibrium
wavefront
Nearby Words
masque
masquerade
Mass
mass
Mass card
mass defect
mass energy
mass media
mass noun
mass number
mass observation
mass spectrograph
mass spectrometer
mass spectrum
mass transit
mass-market
mass-produce
Mass.
massa