lunette
‘a little moon, a satellite, the figure of a crescent moon, semi-circular partial horseshoe’
Lexical development traced from the Tamil root:
E. lunet(t) < F. lunette ‘little moon’ < lune ‘moon’ < Lat. luna ‘the moon’ + -ette < O.F. -et < Vulgar Lat. -ittum /-itta < et < -et < Tamil iṭṭu