the world > life > biology > laboratory analysis > material > [noun] > sample > tool for collecting samples (3)
spec. A dredger for sweeping the sea-bed, consisting of a bar to which are attached a number of hempen ‘mops’, in the fibres of which the more…
a grab for dredging samples from the bottom of a lake or the sea bed.
a device for studying the bacterial content of the air, having a slit through which it is drawn.