Pronunciation: /əˈkɔrdl/
noun a term used in biology to describe organisms that do not possess a notochord
A1 An achordal is a type of marine invertebrate without a notochord.
A2 The biologist studied the achordal to learn more about its anatomy.
B1 A key characteristic of achordals is the absence of a notochord.
B2 The researcher's findings on achordals were published in a scientific journal.
C1 The evolutionary history of achordals is a topic of ongoing research in the field of biology.
C2 Experts in marine biology are conducting extensive studies on the behavior of achordals in their natural habitat.
adjective describing something that lacks a notochord, which is a flexible rod-like structure found in the embryos of all chordates
A1 The achordal jellyfish has a simple body structure.
A2 Some primitive marine animals are considered achordal.
B1 Achordal organisms lack a true notochord.
B2 The evolutionary relationship between chordates and achordal animals is complex.
C1 Research on achordal species has provided valuable insights into early animal evolution.
C2 The absence of a notochord is a defining characteristic of achordal organisms.
formal The achordal fish species lack a swim bladder.
informal I learned that achordal fish don't have swim bladders.
slang Those achordal fish are like the rebels of the sea.
figurative Her achordal approach to problem-solving sets her apart from the rest.
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