From Wiktionary, the free dictionary
mactātū (hapax)
- ablative supine of mactō
c. 99 BCE – 55 BCE,
Lucretius,
De Rerum Natura 1.98, 99:
- sed casta inceste nubendi tempore in ipso hostia concideret mactatu maesta parentis
- but a clean maiden to fall by unclean hands at the very age of wedlock, a victim sorrowful slain by a father’s hand
