phylacto-, phylact-, phylac-, phylax-

(Greek: guard, protect, preserve)

anaphylactic
anaphylaxis
1. A hypersensitivity reaction to the ingestion or injection of a substance (a protein or drug) resulting from a prior contact with a substance.
2. The hypersensitive state which may develop after the introduction of a foreign protein or other antigen into the body tissues.
3. A severe, immediate, potentially fatal bodily reaction to contact with a substance (antigen) to which the individual has previously been exposed.

It is often triggered by antiserum, antibiotics, or insect stings.

crymophylactic
1. Resistant to low temperatures; said of bacteria or microorganisms.
2. Resistant to cold, said of certain microorganisms which are not destroyed even by freezing temperatures.
phylacagogicphylactery
phylactery
phylactic
phylactocarp
phylactotransfusion (s) (noun), phylactotransfusions (pl)
1. A transfusion of blood from a donor who has been immunized by injections of an antigen prepared from microorganisms isolated from the recipient; the recipient then gains passive immunity from the antibodies formed in the donor.
2. Transfusion of blood from a donor previously rendered immune to the disease affecting the recipient.
phylaxin
phylaxiology
phylaxis
prophylactic
prophylactically
prophylaxes (plural)
prophylaxis (singular)