Definition of cetacean in English:


Pronunciation /səˈtāSH(ə)n/ /səˈteɪʃ(ə)n/


  • A marine mammal of the order Cetacea; a whale, dolphin, or porpoise.

    • ‘Killer whales also prey on mammals such as other cetaceans and pinnipeds, as well as on birds and large fish.’
    • ‘Odontocete cetaceans rely upon echolocation to sense the environment and detect prey.’
    • ‘Within odontocete cetaceans, variation in body design affects stability and turning performance.’
    • ‘Previous paleontological and molecular evidence has indicated that cetaceans and artiodactyls constitute a natural clade within the subclass Eutheria.’
    • ‘Marine vertebrates including tunas, seabirds, sharks, sea turtles, pinnipeds and cetaceans use a pelagic ecosystem we barely understand.’


  • Relating to or denoting cetaceans.

    • ‘To work for closer integration of environmental concerns into fisheries management including a reduction in small cetacean casualties.’
    • ‘Further studies will be needed to finally identify the role of the diaphragm in cetacean ventilation.’
    • ‘No ancient DNA has yet been used for cetacean systematics.’
    • ‘The wildlife watch event provides the group with a snapshot overview of cetacean activity around the Irish coast on a single day.’
    • ‘The story focuses on Nathan Quinn, a cetacean biologist trying to figure out what whale song means.’
    • ‘The great depths also attract most of the cetacean species seen off the North Sulawesi coast, including migrating sperm whales.’
    • ‘The research is based on cetacean fossils representing four groups of early whales.’
    • ‘In many ways, the cetacean ear is radically different from the ear of terrestrial mammals.’
    • ‘Most cetacean studies lack the detail of studies on terrestrial species.’
    • ‘Our findings suggest that several regions of the cetacean cytochrome b protein have experienced molecular adaptation.’
    • ‘People in coastal communities are often surprised to learn just how rich our waters are in terms of providing habitat for a diversity of cetacean species.’
    • ‘A significant percentage of cetacean products on sale in Japan have been shown to be highly polluted, posing a potential health threat to consumers.’
    • ‘Despite the questions that remain, Bowles and many cetacean experts endorse pingers because they clearly save animals' lives.’
    • ‘Arguments that behavioral data are fundamentally no different from other kinds of anatomical or molecular data used for systematics should also impact cetacean phylogenetics.’
    • ‘She noted that government scientists investigating a number of cetacean beachings had attributed them to naval exercises involving mid-frequency sonar.’
    • ‘Cetacean evolution is one of several transitions across the land-water barrier documented in the history of vertebrate evolution.’
    • ‘Our future response to these and other threats will determine whether most cetacean species survive.’
    • ‘Hans Thewissen and Philip Gingerich are excellent paleontologists who have recently changed our whole picture of cetacean evolution.’
    • ‘In addition to cortical lobes recognized as fronto-orbital, temporal, and occipital, cetacean mammals present an additional lobe on the inferior surface of each cerebral hemisphere.’
    • ‘Morton's text is generous with information about cetacean life in general and observations of killer-whale behavior in particular.’



/səˈtāSH(ə)n/ /səˈteɪʃ(ə)n/