That's exactly what I'd call it. [Shepard nods at Zam, expression sympathetic, without losing its warmth.] Suits you, though.

[Chuckling at the joking disbelief, she shakes her head.] Reaper weaponry. It's a...[And here, she furrows her brow. Damn, what had the Alliance brains called it?] a type of magnetohy...hydrodynamic artillery.

[There's a pause as she flounders in terminology, then shrugs, knocking back the rest of her drink in one gulp.]

Means a beam of nearly-light-speed molten metal.