cetologist
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ce·tol·o·gy
(sĭ-tŏl′ə-jē)n.
The zoology of whales and related aquatic mammals.
[Latin cētus, whale; see Cetus + -logy.]
ce′to·log′i·cal (sēt′l-ŏj′ĭ-kəl) adj.
ce·tol′o·gist n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.