ver·si·cle /ˈvɜrsɪkəl/

1. a little verse.
2. Ecclesiastical . a short verse, usually from the Psalms, said or sung by the officiant, after which the congregation recites a response. Compare response ( def. 3a ) .

1350–1400; ME < L versiculus. See verse, -i-, -cle 1


But after the responsory, the hymn, and the versicle, as the chanting of the Gospel began, I glimpsed just above the altar, beyond the windows of the choir, a pale glow that was already making the panes shine in their various colors, subdued till then by the darkness.

Source: The Name of the Rose by Umberto Eco.