  SU Lyn, a star that ostensibly appears to be an unremarkable late M type
giant, has recently been proposed to be a symbiotic star largely based on its
hard X-ray properties. The star does not display, in low-resolution optical
spectra, the high excitation lines typically seen in the spectra of symbiotic
stars. In the present work, UV, optical, and near-infrared observations are
presented, aimed at exploring and strengthening the proposed symbiotic
classification for this star. Our Far-UV 1300-1800$\AA$ spectrum of SU Lyn,
obtained with the ASTROSAT mission's UVIT payload, shows emission lines of Si
IV, C IV, OIII and N III in a spectrum typical of symbiotic stars. The UV
spectrum robustly confirms SU Lyn's symbiotic nature. The detection of high
excitation lines in a high-resolution optical spectrum further consolidates its
symbiotic nature. As is being recognized, the potential existence of other
similar symbiotic systems could significantly impact the census of symbiotic
stars in the galaxy.
