plaustra
Found Plaustra with different capitalization.
Plaustra neuter accusative plural, neuter nominative plural, neuter vocative plural of plaustrum
plaustra, ae, v. plaustrum.
plaustra, ae, f. (Nbf. v. plaustrum), der Wagen als Gestirn, Parrhasis, der große Bär, das Siebengestirn, Sidon. carm. 5, 282.
plaustra, æ, f. , c. plaustrum : (constellation) Sid. Carm. 5, 282.