Webster's 1913 Dictionary
LIMULUS
Lim "u *lus, n.; pl. Limuli (-li ). Etym: [L., dim. of limus sidelong, askance. ] (Zoöl.)
Defn: The only existing genus of Merostomata. It includes only a few species from the East Indies, and one (Limulus polyphemus ) from the Atlantic coast of North America. Called also Molucca crab, king crab, horseshoe crab, and horsefoot.
New American Oxford Dictionary
limulus
lim u lus |ˈlimyələs ˈlɪmjələs | ▶noun ( pl. limuli |-ˌlī, -ˌlē | ) an arthropod of a genus that comprises the North American horseshoe crab and its extinct relatives. [Genus Limulus, class Merostomata. ] ORIGIN modern Latin, from Latin limulus ‘somewhat oblique, ’ from limus ‘oblique. ’
Oxford Dictionary
limulus
limulus |ˈlɪmjʊləs | ▶noun ( pl. limuli ) an arthropod of a genus that comprises the North American horseshoe crab and its extinct relatives. ●Genus Limulus, class Merostomata. ORIGIN modern Latin, from Latin limulus ‘somewhat oblique ’, from limus ‘oblique ’.
The Wordsmith Dictionary