cŏartātĭo (cŏarct-), ōnis, f. [coarto],
a drawing or crowding together (rare): laxatio aut coartatio, Vitr. 9, 9: plurium in angusto tendentium, Liv. 27, 46, 2; so, militum eo loco, Auct. B. Alex. 74 fin.
coartātiō (coarct-) ōnis, f coarto, a crowding, pressing together : plurium in angusto, L. ...
An Elementary Latin Dictionary