Same or similar entry in the Synagoge and elsewhere; see the references at Photius, Lexicon lambda116 Theodoridis. Hesychius lambda411 gives "what has been chopped off a stone", and Eustathius, Commentary on Dionysius the Periegete 521, "the little stones that spring out in hewing". These definitions correspond to LSJ s.v. I "the chips of stone in hewing", as used in Strabo 17.1.34, rather than the more common sense II, "gypsum, lime". (It is also how the term is used in tau 988.)
The sense "masonry", for liqourgikh/ (cf. lambda 526), is not otherwise attested, but could be a misunderstanding of the passage in Strabo: "some piles from the latu/ph lay in front of the pyramids" = "some piles because of the stoneworking", rather than "some piles of stone chips".