1. [adv]  (anatomy) in a lateral direction or location; "the body is spindle-shaped and only slightly compressed laterally"
2. [adv]  to or by or from the side; "such women carry in their heads kinship knowledge of six generations depth and extending laterally among consanguineal kin as far as the grandchildren of second cousin"

LATERALLY is a 9 letter word that starts with L.