ICHTHYOPSIDA
\ˈɪkθɪˌɒpsɪdə], \ˈɪkθɪˌɒpsɪdə], \ˈɪ_k_θ_ɪ__ˌɒ_p_s_ɪ_d_ə]\
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By Noah Webster.
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ik-thi-op'si-da, n.pl. one of three primary groups of vertebrates in Huxley's classification (the other two, Sauropsida and Mammalia), comprising the amphibians or batrachians and the fish and fish-like vertebrates. [Gr. ichthys, fish, opsis, appearance.]
By Thomas Davidson
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[Gr.] (Zool.) Fish, and amphibians when classed together as Branchiate vertebrates, i.e. as V. possessing temporary or persistent gills.
By Henry Percy Smith
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