lumen
‘unit to measure light’
Lexical development traced from the Tamil root:
Lat. lumen ‘light’ < loo < leuk- < Tamil el
lumen
Technical words derived from 'lumen'
stylet lumen - அலகு உட்குழாய்; oesophageal lumen - தொண்டை உட்குழாய்.
English words derived from Tamil el connoting ‘rising’