A sudden occurrence (or recurrence) of a disease

• Metrical stress, in poetry
• I'll get cut treated, the source of some stress
• Rhythmic stress
• Musical stress
• Metrical beat
• Stroke cut wildly is making the boundary
• Grimace when run's abandoned, having stress in foot
• Recurring metrical beat

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Ictus \Ic"tus\, n. [L., fr. icere, ictum, to strike.] (Pros.) The stress of voice laid upon accented syllable of a word. Cf. Arsis . (Med.) A stroke or blow, as in a sunstroke, the sting of an insect, pulsation of an artery, etc.

Wiktionary Word definitions in Wiktionary
n. 1 the pulse 2 (context medicine English) A sudden attack, blow, stroke, or seizure, as in a sunstroke, the sting of an insect, pulsation of an artery, etc. 3 (context prosody English) The stress of voice laid upon an accented syllable of a word. Compare ...