hyalinePronunciation: /ˈhʌɪəlɪn, -iːn, -ʌɪn/Definition of hyaline adjective Anatomy & Zoology (chiefly of cartilage) glassy and translucent in appearance. relating to or consisting of hyalin. noun 1 (the hyaline) literary a smooth sea or a clear sky: through the clear hyaline the ship came sailing 2another term for hyalin.Origin: mid 17th century: from Latin hyalinus (see hyalin)hyaline in other Oxford dictionaries Definition of hyaline in the US English dictionary