magnesium

noun

mag·​ne·​sium mag-ˈnē-zē-əm 

-zhəm

: a silver-white malleable ductile light metallic element that occurs abundantly in nature and is used in metallurgical and chemical processes, in photography, signaling, and pyrotechnics because of the intense white light it produces on burning, and in construction especially in the form of light alloys see Chemical Elements Table

Examples of magnesium in a Sentence

Recent Examples on the Web

Notably, most people get an appropriate amount of electrolytes — elements like sodium, potassium and magnesium, which the body requires to function — from a healthy diet, the Cleveland Clinic wrote in a September 2023 blog post. — Megan Sauer, CNBC, 8 Nov. 2026

Besides healthy fats, chia seeds are a good source of fiber, protein, calcium, magnesium, and other important minerals. — Lana Barhum, Verywell Health, 8 Nov. 2026

Moreover, they are packed with other minerals such as magnesium, phosphorus, and B vitamins, which help to prevent bone weakening and improve your overall bone strength. — Suchandrima Bhowmik, HEALTH, 6 Nov. 2026

The leafy green vegetable is loaded with vitamins and minerals, including vitamin C, magnesium, iron, and vitamin B6. — Stacey Lastoe, Southern Living, 1 Nov. 2026

Word History

Etymology

New Latin, from magnesia

First Known Use

1812, in the meaning defined above

Phrases Containing magnesium

• magnesium carbonate
• magnesium chloride
• magnesium hydroxide
• magnesium oxide
• magnesium sulfate

Rhymes for magnesium

• caesium
• cesium
• trapezium

Kids Definition

magnesium

noun

mag·​ne·​sium mag-ˈnē-zē-əm 

-zhəm

: a silver-white metallic element that is light and easily worked, burns with a dazzling light, and is used in making lightweight alloys see element

Medical Definition

magnesium

noun

mag·​ne·​sium mag-ˈnē-zē-əm  -zhəm 

: a silver-white light malleable ductile metallic element that occurs abundantly in nature (as in bones and seeds and in the form of chlorophyll in the green parts of plants) and is used in metallurgical and chemical processes, in photography, in signaling, and in the manufacture of pyrotechnics because of the intense white light it produces on burning, and in construction especially in the form of light alloys

—symbol Mg see Chemical Elements Table