Lecithocera sinuosa is a moth in the family Lecithoceridae. It was described by Edward Meyrick in 1910. It is found in Sri Lanka.

The wingspan is . The forewings are light glossy grey with a slight purplish tinge and with a narrow rather inwards-curved pale ochreous-yellowish fascia from three-fourths of the costa to the tornus. The hindwings are light grey.Journal of the Bombay Natural History Society. 20 (2): 444.

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