laterallyadverb
uk/ˈlæt.ər.əl.i/us/ˈlæt̬.ɚ.əl.i/formal towards the side
specialized medical in a direction away from the midline:
a laterally spreading tumour
specialized phonetics with the flow of air blocked in the middle, so that the air flows to the side:
The sound /l/ is produced laterally.