• WordNet 3.6
    • n ictus a sudden occurrence (or recurrence) of a disease "he suffered an epileptic seizure"
    • ***
Webster's Revised Unabridged Dictionary
    • Ictus (Med) A stroke or blow, as in a sunstroke, the sting of an insect, pulsation of an artery, etc.
    • Ictus (Pros) The stress of voice laid upon accented syllable of a word. Cf. Arsis.
    • ***
Century Dictionary and Cyclopedia
    • n ictus A stroke: as, ictus solis, sunstroke.
    • n ictus In prosody and music, rhythmical or metrical stress; additional intensity of utterance or delivery distinguishing one time or syllable in a foot or series from the others. Metrical ictus in poetry is analogous to syllabic stress or accent in ordinary speech. In modern or accentual poetry an ictus regularly coincides with the syllabic stress or accent, primary or secondary. In classical or quantitative poetry the ictus was also a stress-accent, but was independent of the syllabic accent, which was a difference in tone or pitch. It regularly attached itself to a long time or syllable as contrasted with one or more shorts, but a long or longs could be metrically unaccented. The conflict between ictus and accent in ancient poetry may be exemplified by the line
    • n ictus in which the accent is marked and the syllables bearing the ictus are italicized. The part of a foot on which the ictus falls is called the thesis (but see arsis). In a dipody one ictus is stronger than the other. In a colon the ictus of one measure dominates all others. A subordinate ictus can also accompany the principal ictus within the same foot.
    • ***
Chambers's Twentieth Century Dictionary
    • n Ictus ikā€²tus a stroke: rhythmical or metrical stress
    • ***


Webster's Revised Unabridged Dictionary
L., fr. icere, ictum, to strike
Chambers's Twentieth Century Dictionary
L., 'a blow.'


In literature:

Ut lubet feriat, abstergant hos ictus Democriti pharmacos.
"The Anatomy of Melancholy" by Democritus Junior
The syllable which receives the ictus is called the thesis; the rest of the foot is called the arsis.
"New Latin Grammar" by Charles E. Bennett
"Lives of the Most Eminent Painters Sculptors and Architects" by Giorgio Vasari