διόπτρα: Difference between revisions

|Definition=ἡ, <span class="sense"><span class="bld">A</span> [[diopter]], [[dioptre]], [[dioptra]], [[optical]] [[instrument]] for measuring [[angle]]s, [[altitude]]s, etc., <span class="bibl">Euc.<span class="title">Phaen.</span>p.10M.</span>, <span class="bibl">Plb.10.46.1</span>, Attal. ap. <span class="bibl">Hipparch.1.10.24</span>, <span class="bibl">Gem. 1.4</span>, Ptol.<span class="title">Alm.</span>5.14, etc.; ἡ τῶν δ. θεωρία <span class="bibl">Gem.5.11</span>. </span><span class="sense"><span class="bld">2</span> [[aperture]] [[sight]] in a [[torsion]]-[[engine]], <span class="bibl">Ph.<span class="title">Bel.</span>64.9</span>, <span class="bibl">76.48</span>. </span><span class="sense"><span class="bld">II</span> [[plate]] of [[talc]] for glazing [[window]]s, <span class="bibl">Str.12.2.10</span>. </span><span class="sense"><span class="bld">III</span> = [[διαστολεύς]] ([[instrument]] for examining cavities, [[dilator]]), <span class="bibl">Aët.16.89</span>, <span class="bibl">Paul.Aeg.6.73</span>. </span><span class="sense"><span class="bld">IV</span> <b class="b3">σημεῖον ἐν θυτικῇ</b> = a [[portent]] (mark, sign) in [[sacrificial]] [[practice]], Hsch.</span>