| bystander | One who stands near; a spectator; one who has no concern with the business transacting. "He addressed the bystanders and scattered pamphlets among them." (Palfrey) Synonym: Looker on, spectator, beholder, observer. Origin: By + stander, equiv. To stander-by; cf. AS. Big-standan to stand by or near. Source: Websters Dictionary (01 Mar 1998) |
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| bystander help | <immunology> Lymphokine mediated non-specific help by T lymphocytes, stimulated by one antigen, to lymphocytes stimulated by other antigens. (21 Mar 1998) |
| innocent bystander cell | The destruction of a cell by an immune process even though that cell was not directly targeted. (05 Mar 2000) |
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