Nutrient
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The "murderous mistletoe" fed on the nutrients of their host, a potentially fatal process. (PROSE: The Christmas Inversion)
Magnesium, sodium, potassium and chloride were vital nutrients and were necessary for living things to grow. (TV: The Waters of Mars)
Brittany Mordley needed iron-rich nutrients after she administered Cyberon. Thus, she ate pre-made meals. (PROSE: Silver-Tongued Liars)