Correct spelling for the English word "Isobarin" is [ˈa͡ɪsəbəɹˌɪn], [ˈaɪsəbəɹˌɪn], [ˈaɪ_s_ə_b_ə_ɹ_ˌɪ_n] (IPA phonetic alphabet).
There is no dictionary definition available for the word "Isobarin." It is possible that this term is not well-established or commonly recognized in the English language.