Lewis & Short

pŭtĭcŭli, ōrum, m., or pŭtĭcŭlae, ārum, f. [puteus, a well-hole], the gravepits, i. e. the subterranean burying-places, near the Esquiline Hill, for the poor and for slaves, Varr. L. L. 5, § 25 Müll.; Paul. ex Fest. p. 216 Müll.