(biochemistry) The component of hemoglobin (and other hemoproteins) responsible for binding oxygen. It consists of an iron ion that binds oxygen and a porphyrin ring that binds the globin molecules...

plural of metaler

(heraldry): Of a fish: oriented vertically, with the head to base and tail to chief, as if positioned for diving.

A property of a system such that an output value is not a strict function of the corresponding input, but also incorporates some lag, delay, or history dependence, and in particular when the respon...