Losing face, grimace in stress

• A sudden occurrence (or recurrence) of a disease
• Stress
• Beat for Byron
• Poetic stress
• Rhythmic stress
• Grimace when run's abandoned, having stress in foot
• Metrical stress, in poetry

Wiktionary Word definitions in Wiktionary
n. (context rare English) (plural of ictus English)

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.