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

Strengthens Immunity Bananas' nutrients like potassium, vitamin C, B vitamins, and magnesium boost immune system function, protecting you from infectious diseases. —Cristina Mutchler, Verywell Health, 7 May 2025

The researchers also added microscopic magnesium particles that act as tiny stirrers. —Jenny Lehmann, Discover Magazine, 2 May 2025

Studies on how well topical magnesium raises magnesium levels in the body are conflicting. —Kirstyn Hill, Pharmd, Mph, Health, 30 Apr. 2025

The mood sampler pack includes recipes like magnesium L‑threonate for brain health, L-theanine for tension relief and ginseng for better focus. —Ramsey Qubein, Forbes.com, 21 Apr. 2025

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