plateletpheresis - platelets are separated from whole blood and the rest is returned to the donor. pheresis, apheresis - a procedure in which blood is drawn and separated into its components by dialysis; some are retained and the rest are returned to the donor by transfusion.
Webster Dictionary(0.00 / 0 votes)Rate this definition: Iodine(noun) a nonmetallic element, of the halogen group, occurring always in combination, as in the iodides. When isolated it is in the form of dark gray metallic scales, resembling plumbago, soft but brittle, and emitting a chlorinelike odor.
However, iodine contains only one type of atom (all its atoms have the same number of protons). Thu â¦ s, iodine is an element, not a compound. However, free Iodine only exists as a diatomic molecule at standard conditions. I2 is how you write the formula of the Iodine molecule. It is definitely molecular but, depending on how you define compound, it might not fit that definition because it is all the same type of atom.