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Medical Term:


Pronunciation: sem'el-in'si-dent

Definition: An obsolete term that means happening only once; said of an infectious disease, one attack of which confers permanent immunity.

[L. semel, once, + incido, to happen, fr. cado, to fall]

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.