An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration.
Dioxygen,Oxygen-16,Oxygen 16
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Child
A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL.
Children
D004869
Equipment Safety
Freedom of equipment from actual or potential hazards.