Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† părallēlus, a, um, and părallēlos, on, adj., = παράλληλος, paraliel: parallelos linea, Vitr. 5, 8: circuli paralleli; or absol. paralleli, concentric circles on the celestial globe, parallels of latitude: nostri circulos appellavere, Graeci parallelos, Plin. 6, 33, 39, § 212; Mart. Cap. 8, § 817.