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[per-ee-as-truh n, -tron] /ˌpɛr iˈæs trən, -trɒn/

noun, plural periastra
[per-ee-as-truh] /ˌpɛr iˈæs trə/ (Show IPA). Astronomy.
the point at which the stars of a binary system are closest (opposed to ).
(astronomy) the point in the orbit of a body around a star when it is nearest to the star, esp applied to double-star systems
(pěr’ē-ās’trən, -trŏn)
Plural periastra


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    peribronchial per·i·bron·chi·al (pěr’ə-brŏng’kē-əl) adj. Of, relating to, or surrounding a bronchus or the bronchi.

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