Entry: tripartite (adj.)
In context: "There's the sudden tripartite whump of three Empire Waste Displacement vehicles being propelled above the cloud-cover to points far north."
Definition: Divided into or composed of three parts or kinds; threefold, triple.
Other:I guess this one was sort of marginal as an entry. So, uh, how about this? If you take the letters in TRIPARTITE, add DGIOS, scramble 'em, you can spell PRESTIDIGITATOR (n.), which the OED defines thusly:
A person who practises sleight of hand or legerdemain; a conjuror; a juggler. Also in extended use.
SNOOT score: 1
Source: Oxford English Dictionary