Pronunciation: /ˈspaɪrəkəl/
noun a small opening on the surface of an organism, especially in an insect or aquatic animal, through which air is taken in or expelled
A1 Fish breathe through small openings called spiracles.
A2 Insects use spiracles to take in oxygen and release carbon dioxide.
B1 The spiracle on a shark's body helps regulate its buoyancy.
B2 Some amphibians have spiracles that allow them to breathe both underwater and on land.
C1 Scientists study the function of spiracles in various species to understand their respiratory systems better.
C2 The intricate design of spiracles in insects showcases the evolution of respiratory adaptations over time.
formal The spiracle is a small opening on the surface of an insect's body used for breathing.
informal I learned that insects breathe through tiny holes called spiracles.
slang Check out the spiracle on that bug, it's so small!
figurative Her eyes were like spiracles, always watching and observing everything around her.
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