laterigrade
/ˈlat(ə)rɪˌɡreɪd/Zoology
adjective
(Characterized by) walking or running sideways; formerly specifically designating a spider of the group Laterigradae (now disused ).
Origin
Mid 19th century (in an earlier sense). From lateri- + -grade, after post-classical Latin laterigradus, adjective, scientific Latin Laterigradae, former group name (Latreille 1817).