A tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways
Noun
any of the membranous air-filled extensions of the lungs of birds
Noun
any of the thin-walled extensions of the tracheae of insects
Noun
a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways
Usage Examples
air_sac, qair_sac, wair_sac, sair_sac, zair_sac, qir_sac, wir_sac, sir_sac, zir_sac, aqir_sac, awir_sac, asir_sac, azir_sac, auir_sac, a8ir_sac, a9ir_sac, aoir_sac, ajir_sac, akir_sac, aur_sac, a8r_sac, a9r_sac, aor_sac, ajr_sac, akr_sac, aiur_sac, ai8r_sac, ai9r_sac, aior_sac, aijr_sac, aikr_sac, aier_sac, ai4r_sac, ai5r_sac, aitr_sac, aifr_sac, aie_sac, ai4_sac, ai5_sac, ait_sac, aif_sac, aire_sac, air4_sac, air5_sac, airt_sac, airf_sac, air_sac, airsac, air_sac, air_asac, air_wsac, air_esac, air_dsac, air_xsac, air_zsac, air_aac, air_wac, air_eac, air_dac, air_xac, air_zac, air_saac, air_swac, air_seac, air_sdac, air_sxac, air_szac, air_sqac, air_swac, air_ssac, air_szac, air_sqc, air_swc, air_ssc, air_szc, air_saqc, air_sawc, air_sasc, air_sazc, air_saxc, air_sadc, air_safc, air_savc, air_sa c, air_sax, air_sad, air_saf, air_sav, air_sa , air_sacx, air_sacd, air_sacf, air_sacv, air_sac .