Entry: zygomatics (n.)
In context: "His [Hal's -- JM] parents' pregnancies must have been all-out chromosomatic war: Hal's eldest brother Orin has got the Mom's Anglo-Nordo-Canadian phenotype, the deep-socketed and lighter-blue eyes, the faultless posture and incredible flexibility (Orin was the only male anybody at E.T.A.'d ever heard of who could do a fully splayed cheerleader-type split), the rounded and more protrusive zygomatics."
Definition: Short for zygomatic muscle n. at sense A. or zygomatic bone n. at sense A.
Other: Your zygomatic muscle (which looks like fetching - have you been working out lately?) helps you to smile. Check out this Wikipedia entry.
SNOOT score: 1
Source: Oxford English Dictionary, Wikipedia