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

Flaxseed Bread Flaxseeds are high in important nutrients like fiber, copper, magnesium, and selenium. —Jillian Kubala, Health, 20 May 2025

One large review suggests that magnesium may reduce symptoms of anxiety in people with:6 Mild anxiety Premenstrual anxiety Postpartum anxiety High blood pressure Magnesium helps regulate chemicals that send messages throughout the body and brain, which may improve brain function.6 5. —Julie Marks, Verywell Health, 19 May 2025

It’s infused with coconut water, magnesium, and vitamin B12 to keep lips hydrated for up to 12 hours. —Jailynn Taylor, Allure, 18 May 2025

Micronutrients are trace elements like calcium, magnesium, sulfur, and iron that a fruit tree needs to thrive. —Leanne Potts, Better Homes & Gardens, 5 May 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