acoustic
Examination of a foetus and the amniotic fluid in the lowest part of the amniotic sac using an amnioscope introduced through the cervical canal.
(mathematics) A regular three-dimensional object in which every cross-section is a circle; the figure described by the revolution of a circle about its diameter .
(usually in the plural) The properties or qualities of a room or building that determine how sound is transmitted in it. / (medicine) A medicine or other agent to assist hearing.
(transitive) To crumple and squeeze to make more compact.
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