calcium noun Stress: first syllable 🤍 Save Syllables: cal-ci-um (3) English Definition A soft gray chemical element essential for healthy bones and teeth. Example Sentence Milk is an excellent source of calcium. US IPA /ˈkælsiəm/ 🔊 Listen US UK IPA /ˈkælsiəm/ 🔊 Listen UK Synonyms mineral element nutrient Antonyms toxin poison Share this Word Facebook WhatsApp X Telegram Copy Link