ICHTHYOLOGY
Source: 566, 567
ichthyology. Ichthyology, [ch as k] n. the science of fish of all kinds
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Ich′thy‐ol″o‐gy (?), n. [[Gr. ιχθὔσ, -ύοσ, a fish + -logy: cf. F. ichthyologie.]] The natural history of fishes; that branch of zoölogy which relates to fishes, including their structure, classification, and habits.