B1
a dark grey metal used to make steel and found in very small amounts in blood and food
Dictionary examples:
The student's excuse: 'My dog ate my iron homework!' (0.0)
My friend tried to eat iron cereal for breakfast. It was not tasty! (0.0)
The gym's new workout: lifting pieces of iron and eating them. (0.0)
an iron bar (21.0)
Liver is a particularly rich source of iron. (42.5)
Iron rusts easily. (54.0)