The editor of TLL takes the word to be an adjective glossing Latin scutilatos, thereby creating a hapax. However, the word more likely glosses the noun scuto and should be interpreted as escu1.
a.
1horsescolour(of a horse's coat) piebald, with differently coloured patches:
(
MS: s.xiiiex
)
Parte autem altera equos autem inter fructecta in equicio vagantes, precipuis tresdecim coloribus, secundum Isodori discinctionem, spectabiles, notare non tedebat：badeos, aureos, myrteos, cervinos [...] scutilatos gloss: a scuto: escué(l. escue)i 173.78 and ii 56.78
(escué) (s.xiiiex)