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The word ludicrae could not be parsed. Trying a normal dictionary lookup:
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lūdĭcer or lūdī̆crus (nom. sing. m. is not used), cra, crum, adj. [ludus], that serves for sport, done in sport, sportive: ars, Plaut. Aul. 4, 3, 3: exercitatio, Cic. N. D. 1, 37, 102: sermones, id. Ac. 2, 2, 6: ludicrae artes sunt, quae ad voluptatem oculorum atque aurium tendunt, Sen. Ep. 88, 22: ludicras partes sustinere, to appear on the stage, Suet. Ner. 11: certamen, Vell. 1, 8, 1: tibiae, which were played in the theatre, Plin. 16, 36, 66, § 172: in modum ludicrum, Tac. A. 14. 14: versus et cetera ludicra pono, Hor. Ep. 1, 1, 10: quibus (juvenibus) id ludicrum est, Tac. G. 24: solemnibus epulis ludicra, id. A. 1, 50: hac lege excipiuntur qui artem ludicram faciunt, actors, Paul. Sent. 5, 26, 2; so, quae artem ludicram fecerit, Ulp. Fragm. 13, 1 sq.
Hence, lūdī̆-crum, i, n.
lūdī̆cror, āri, v. dep. [ludicrum], to joke, jest, Front. ad Amic. 1, 15 Mai.
lūdī̆crus, v. ludicer.