duck down
(idiomatic, intransitive) To crouch in order to hide or protect oneself. / (idiomatic, intransitive) To stoop oneself down quickly, in order to avoid being hit.
Characterised by harassment; tormentuous; bothersome
(mineralogy) A monoclinic-prismatic mineral containing arsenic, cobalt, hydrogen, iron, lead, nickel, and oxygen.
plural of perceptron
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