cytotoxic reactionn. An immunological reaction in which a noncytotropic antibody combines with a specific antigen on the surface of a cell and forms a complex that initiates the activation of complement, leading to cell lysis or other damage.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.