The Britannica Dictionary
mobile search
Home
Ask the Editor
Word of the Day
Quizzes
Core Vocabulary
Browse the Dictionary
×
Britannica Homepage
Ask the Editor
Word of the Day
Quizzes
Core Vocabulary
Browse the Dictionary
The Britannica Dictionary
magnesium
1 ENTRIES FOUND:
magnesium
(noun)
magnesium
/mæg
ˈ
niːzijəm/
noun
magnesium
/mæg
ˈ
niːzijəm/
noun
Britannica Dictionary definition of MAGNESIUM
[
noncount
]
:
a silver-white metallic element that produces a very bright white light when it burns
ASK THE EDITOR
What is the difference between 'distinct' and 'distinctive'?
See the answer »
QUIZZES
Vocabulary Quiz
Test your word power
Take the Quiz »
Name That Thing
Take our visual quiz
Test Your Knowledge »
WORD OF THE DAY
sectional
:
a type of long seat (called a sofa) that has three or more separate sections (
US
)
Learn More »