external gill (or external branchia)

bits-denotation chidley chip off the old block cross-screw curved slat conveyor disturbance of speech don't turn upside down gupta's subset selection method hydrogen induced absorption peak inbound telemarketing invalidity of a contract mutational lag pipe-stem arteries pressroom pumping limit self propelled single row harvester thrasher sharing of revenue turbulent-energy spectrum ubiquitin-proteasome unicellular bios