LSJ
(not θημωνία), ἡ, = θημών, θ. ἅλωνος LXX Jb. 5.26; συνήγαγον αὐτοὺς θημωνιὰς θημωνιάς ib. Ex. 8.14 (10), cf. Eust. 1539.16; — also θειμωνείαι and θημονιαί, Hsch.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
TBESG
a heap (MT)
Translators Brief lexicon of Extended Strongs for Greek based on Abbot-Smith, A Manual Greek Lexicon of the New Testament (1922) (=AS), with corrections and adapted by Tyndale Scholars