[pahr-uh-vid-yah] /ˌpɑr əˈvɪd yɑ/
[pa ra-vyawn] /pa raˈvyɔ̃/ adverb, French. 1. by plane (used especially as a designation on matter to be sent by airmail). /par avjɔ̃/ adverb 1. by aeroplane: used in labelling mail sent by air
[par-uh-wing] /ˈpær əˌwɪŋ/ noun, Aerospace. 1. .
[par-ak-see-uh l] /pærˈæk si əl/ adjective, Optics. 1. making a small angle with and lying close to the axis of an optical system: paraxial ray. /pæˈræksɪəl/ adjective 1. (physics) (of a light ray) parallel to the axis of an optical system paraxial par·ax·i·al (pā-rāk’sē-əl) adj. Located alongside of the axis of a body or part.
paraxon par·ax·on (pā-rāk’sŏn’) n. A collateral branch of an axon.