| immunologically activated cell | An immunocyte that is in an elevated state of reactivity capable of carrying out an immune response, in contradistinction to an immunologically competent cell. (05 Mar 2000) |
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| immunologically competent cell | A small lymphocyte capable of being immunologically activated by exposure to a substance that is antigenic (immunogenic) for the respective cell; activation involves either the capacity to produce antibody or the capacity to participate in cell-mediated immunity. (05 Mar 2000) |
| immunologically privileged sites | Sites where allografts are not readily rejected, probably because these particular areas have poor lymphatic drainage. (05 Mar 2000) |