单词	osculum
释义	osculum /ˈɒskjʊləm / noun (plural oscula /ˈɒskjʊlə/) Zoology A large aperture in a sponge through which water is expelled.Sponges will react by closing ostia or oscula, either because of direct physical stimulation or when suspended particles within the sponge are too large or highly concentrated.... In budding, aggregates of cells differentiate into small sponges that are released superficially or expelled through the oscula. The hole closes and it is not until some days later that the sponge forms an osculum at its apical pole. Origin Early 17th century: from Latin 'little mouth'.
随便看	yearningly year-old year on year year over year year ring year-round years-long year's mind years of discretion year-to-year yeasayer yeast yeastily yeastiness yeastless yeast-like yeasty Yeats, W. B. yebo YEC yecch yech yechy yeeeek yeeek

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