O-type
Most common type
O-type designates the hottest, most massive class of stars in astronomical classification, appearing blue-white and burning through their fuel rapidly.
The term extends to blood typing, where O-type (or type O) blood lacks A and B antigens, making O-negative the universal donor: O-type blood is always in demand at blood banks.
Transfer of blood intravenously
- universal donorBlood compatible with anyone
- red cellsOxygen-ferrying blood components
- Rh factorRed cell surface protein
- plasmaElectrified matter state
donation · compatibility · antibodies · antigens · crossmatch · hemoglobin · blood bank · phlebotomy
Luminous astronomical object
- bluePrimary color; also sad
- hotHaving much warmth
- massiveExtremely large and heavy
- luminousEmitting or reflecting light
supergiant · main sequence · temperature · ionization · Rigel · ultraviolet · fusion · hydrogen
transfusion
Transfer of blood intravenously
- universal donorBlood compatible with anyone
- red cellsOxygen-ferrying blood components
- Rh factorRed cell surface protein
plasma · donation · compatibility · antibodies · antigens · crossmatch · hemoglobin · blood bank · phlebotomy · recipient
star
Luminous astronomical object
luminous · supergiant · main sequence · temperature · ionization · Rigel · ultraviolet · fusion · hydrogen · helium
laid-back
Calm and unhurried
patient · flexible · peaceful · tolerant · agreeable · unhurried · carefree · procrastinator · mediator · adaptable
O-typeB-type
A classification category
AB positive · AB negative · type AB · type B · universal recipient
O-typered dwarf
Low-mass, cool star
red giant · cool star · brown dwarf · F-type