Wiktionary
hypothiocyanite
n. (context organic compound English) An organic compound formed when an oxygen is singly bonded to the thiocyanate group, found in the antimicrobial immune system of the human respiratory tract.
Wikipedia
Hypothiocyanite
Hypothiocyanite is the anion [OSCN] and the conjugate base of hypothiocyanous acid (HOSCN). It is an organic compound part of the thiocyanates as it contains the functional group SCN. It is formed when an oxygen is singly bonded to the thiocyanate group. Hypothiocyanous acid is a fairly weak acid; its dissociation constant is 5.3.
Hypothiocyanite (also named hypothiocyanate) is formed by peroxidase catalysis of hydrogen peroxide and thiocyanate:
HO + SCN → OSCN + HO