<p><strong>Noun:</strong></p><ul><li>An optical instrument through which two pictures of the same object, taken from slightly different points of view, are viewed, one by each eye, producing the effect of a single picture of the object, with the appearance of depth or relief.</li></ul><p><strong>Verb:</strong></p><ul><li>To mark or paint (a surface) by means of a stencil.</li><li>To produce (letters, figures, designs, etc.) by means of a stencil.</li></ul>