Wiktionary
a. Of several megatons.
Usage examples of "multimegaton".
Portia stared at the screen pensively as the puppets muttered to each other, scheduled a course adjustment to nudge the multimegaton mass of the liner closer toward the docking tree at the hub of the enormous station.
Humans might be gone, life support might be dead—algal ponds crashed, macroscopic plants killed, even the cockroaches fried by the kiloGray radiation pulse—but the multimegaton wheel continued to spin endlessly in the frigid void, waiting for an uncertain return.
Some time ago, the ship's momentum exceeded half its rest mass, at which point a single kilogram packs the punch of a multimegaton hydrogen bomb.
It's one of several hundred multimegaton soap bubbles floating in the sea of turbulent hydrogen and helium that is the upper atmosphere of Saturn, seeded there by the Society for Creative Terraforming, subcontractors for the 2074 Worlds' Fair.
With a little luck, he could ignite the superheated and compressed monatomic hydrogen directly ahead of the projectile, and let the multimegaton explosion flip it up or down off the ballistic trajectory the humans had launched it on.
The sun was rising, and he'd been up all night, witnessed an impossible dogfight conducted with nukes and what had to be some sort of energy weapons, survived a multimegaton blast at entirely too close a range for comfort, and rescued a critically wounded and all too human-looking alien from certain death by drowning.
Warship screens can absorb multimegaton explosions, but even a heavy Troll chassis isn't big enough to carry screen that powerful.
It had the unparalleled computer power of a Brown-Ash Mark IX computer, a whole constellation of engineering testing equipment, laboratories and offices big enough to house a small city, invulnerability to even a direct strike by a multimegaton hydrogen bomb, and internal security so strict that, to prevent leakage of plans, all but the most senior staff had to agree to remain in the inaccessible but comfortable underground chamber until all plans were complete and their implementation begun.