what does anaphylactic shock mean?

ANAPHYLACTIC SHOCK as NOUN

Meaning
- a severe and rapid and sometimes fatal hypersensitivity reaction to a substance (especially a vaccine or penicillin or shellfish or insect venom) to which the organism has become sensitized by previous exposure
Hypernyms(s) anaphylactic shock is a kind of… Example: animal is a hypernym of mammal, plant is a hypernym of flower
- anaphylaxis (what does anaphylaxis mean?)