The headword adjective, here neuter singular, is otherwise unattested in this form; however, it is apparently a variant of (or an error for) leura/n, which occurs in Lycophron, Alexandra line 159, and is glossed lei/an (inter alia) in the scholia there.
For the glossing adjective see lambda 372; and cf. lambda 369, lambda 370, lambda 371, lambda 373, lambda 374.