later-

latero-

, later-, lateri- [L. latus, stem l ater-, side]
Prefixes meaning side or lateral.
Medical Dictionary, © 2009 Farlex and Partners

later-

or

latero-

prefix denoting sideways.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005