WordReference Random House Unabridged Dictionary of American English © 2026
pas′sive immu′nity, [Immunol.]
- immunity resulting from the injection of antibodies or sensitized lymphocytes from another organism or, in infants, from the transfer of antibodies through the placenta or from colostrum.
- 1890–95
'passive immunity' also found in these entries (note: many are not synonyms or translations):