rare1. [f. Gr. κατάκλυσμα, -ματος (taken as = κατακλυσμός CATACLYSM) + -IST.] CATACLYSMIST.
1860. Maury, Phys. Geog. Sea (Low), xv. § 645. It is manifest, say the cataclysmatists, that, though the two hemispheres do receive annually the same amount of solar heat, [etc.].
So Cataclysmatic a. = CATACLYSMAL.
1883. Merivale, White Pilgr., 186, Häckel, 29.
| Fast dying out are mans later appearances, | |
| Cataclysmitic geologies gone | |
| Now of Creation completed the clearance is: | |
| Häckel of J. you must anchor upon. | 
1889. Geo. W. Hale, Æons Ago, in Puck., 6 March, 19.
| But by some sudden glacial cataclysmatic change, | |
| Oh! the whole Brobdingnaggian troop | |
| Were irrevocably buried in Cenozoic drift, | |
| And irretrievably lost In the soup. |