Likewise in Photius (and ps.-Zonaras). However, the headword verb does not occur in Thucydides -- as first noted by F.L. Abresch (1699-1782) -- and is in fact unattested anywhere outside lexicography; it is also missing from LSJ.
'Thucydides' may of course simply be an error. But if not, the headword itself -- for another verb which does occur in this author -- must be faulty (and is indeed obelized in the editions of Photius). Given the gloss, one might think of the future tense of uncompound bou/lomai: see e.g. 5.106, 6.40.1, 6.86.5, 8.48.5.