Ultramaximal

It is moreover clear that the formation of processes and streamings may be brought about without physiological contractions, by mere shrinking of the superficial layer (as in partial drying, which for instance occurs not unfrequently in very large plasmodia, or by the coagulation of the albumen, e.g. after ultramaximal electrical excitations).

Source: wiktionary

However, when we look more closely at the cases under consideration, we find that sometimes maximal and even ultramaximal doses of morphine were injected (Chouppe, 0.03 grm., or 1\2 grain; Nussbaum as much as 0.12 gram., or 1.8 grain).

Source: wiktionary

Although ultramaximal temperatures, beyond which the death of succulent tissue ensues, vary between considerable limits depending on the species, the stage of development, and external conditions, a temperature of from 122° to 131° F. is often fatal for young, tender plants.

Source: wiktionary