spiracle
(redirected from spiracula)

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spiracle

1. any of several paired apertures in the cuticle of an insect, by which air enters and leaves the trachea

2. a small paired rudimentary gill slit just behind the head in skates, rays, and related fishes

3. any similar respiratory aperture, such as the blowhole in whales

4. Geology a protrusion of sediment into a lava flow, formed by the explosive transition of water into steam

spiracle [′spir·ə·kəl]

(invertebrate zoology)

An external breathing orifice of the tracheal system in insects and certain arachnids.

(vertebrate zoology)

The external respiratory orifice in cetaceous and amphibian larvae.

The first visceral cleft in fishes.

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No references found			Spinola, Ambrogio Spinola, Ambrogio Di Spínola, António Sebastião Ribeiro de Spinone Italiano Spinor Spinor Calculus spinous process Spinoza Spinoza, Baruch Spinoza, Benedict de SpinRite spinster Spinsterhood Spinthariscope Spintheridae spintronics Spinulosida spiny spiny anteater Spiny Dogfish spiny-rayed fish Spionidae spioniform worm spira spiracle spiracula Spiraea Spiral Spiral And Helical Antennas Spiral Arm spiral arms spiral balance spiral band spiral bevel gear spiral binding Spiral Case Spiral Chute spiral cleavage spiral column spiral conveyor spiral cutterhead spiral delay line spiral flow tank spiral flow test spiral four cable spiral gage Spiral Galaxy spiral ganglion spiral gear spiral grain spiral layer			SPIO Spiodea Spionidae spioniform worm SPIOR SPIP SPIPA SPIPES SPipistrellus hesperus SPIPM Spippolatori Group SPIQ SPIR spir(o)- spir- Spira Spira Spira (disambiguation) Spira mirabilis Spira mirabilis Spirable spiracle spiracle spiracle Spiracles Spiracles Spiracles Spiractin Spiractin Spiractin spiracula spiracular spiracular spiracular spiraculum spiraculum spiraculum spiradenoma Spiraea Spiraea Spiraea Spiraea douglasii Spiraea douglasii Spiraea prunifolia Spiraea tomentosa Spiraea tomentosa Spiraea ulmaria Spiraea ulmaria Spiraea ulmaria Spiraeas Spiraeas Spiraeic spiral spiral spiral spiral spiral spiral Spiral Acquisition Spiral And Helical Antennas Spiral and radial cleavage

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spiracle (redirected from spiracula)

spiracle
(redirected from spiracula)