ICTUS

‖Ic″tus (?), n. [[L., fr. icere, ictum, to strike.]] 1. 1. (Pros.) The stress of voice laid upon accented syllable of a word. Cf. Arsis.
2. 2. (Med.) A stroke or blow, as in a sunstroke, the sting of an insect, pulsation of an artery, etc.