properdin

noun

pro·​per·​din prō-ˈpər-dᵊn 

: a blood serum protein that participates in the activation of complement in a pathway which does not involve the presence of antibodies

Word History

Etymology

probably from pro- entry 1 + Latin perdere to destroy + English -in entry 1 — more at perdition

First Known Use

1954, in the meaning defined above

Medical Definition

properdin

noun

pro·​per·​din prō-ˈpərd-ᵊn 

: a blood serum protein that participates in the activation of complement in a pathway which does not involve the presence of antibodies