significans
Could not find significantissimo in Logeion dictionaries.
significantissimo masculine ablative singular superlative, neuter dative singular superlative, masculine dative singular superlative, neuter ablative singular superlative of significans
signĭfĭcans, antis, Part. and P. a. of significo.
sīgnificāns, antis, PAdi. (significo), I) bezeichnend, treffend, deutlich, verba significantia et nitida, Quint. 11, 1, 2: significantissimum vocabulum, Gell. 1, 15, 17. – II) anschaulich, locorum dilucida et significans descriptio, die Orientierung über Örtlichkeiten, Quint. 9, 2, 44: quia significantius est, Quint. 8, 6, 6.
signĭfĭcāns, tis, ¶ 1 part. de significo ¶ 2 adjt , qui exprime bien, expressif : Quint. 9, 2, 44 ; 11, 1, 2 ; 12, 10, 21 || -tior Quint. 8, 2, 9 ; -tissimus Gell. 1, 15, 17.