<p><strong>Noun:</strong></p><ul><li>Algebra: An expression that is a sum or difference of two terms, as <span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mn>3</mn><mi>x</mi><mo>+</mo><mn>2</mn><mi>y</mi></mrow><annotation encoding="application/x-tex">3x + 2y</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height: 0.7278em; vertical-align: -0.0833em;"></span><span class="mord">3</span><span class="mord mathnormal">x</span><span class="mspace" style="margin-right: 0.2222em;"></span><span class="mbin">+</span><span class="mspace" style="margin-right: 0.2222em;"></span></span><span class="base"><span class="strut" style="height: 0.8389em; vertical-align: -0.1944em;"></span><span class="mord">2</span><span class="mord mathnormal" style="margin-right: 0.03588em;">y</span></span></span></span> and <span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><msup><mi>x</mi><mn>2</mn></msup><mo>−</mo><mn>4</mn><mi>x</mi></mrow><annotation encoding="application/x-tex">x^2 - 4x</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height: 0.8974em; vertical-align: -0.0833em;"></span><span class="mord"><span class="mord mathnormal">x</span><span class="msupsub"><span class="vlist-t"><span class="vlist-r"><span class="vlist" style="height: 0.8141em;"><span style="top: -3.063em; margin-right: 0.05em;"><span class="pstrut" style="height: 2.7em;"></span><span class="sizing reset-size6 size3 mtight"><span class="mord mtight">2</span></span></span></span></span></span></span></span><span class="mspace" style="margin-right: 0.2222em;"></span><span class="mbin">−</span><span class="mspace" style="margin-right: 0.2222em;"></span></span><span class="base"><span class="strut" style="height: 0.6444em;"></span><span class="mord">4</span><span class="mord mathnormal">x</span></span></span></span>.</li><li>Zoology, Botany: A taxonomic name consisting of a generic and a specific term, used to designate species.</li></ul><p><strong>Adjective:</strong></p><ul><li>Algebra: Consisting of or pertaining to two terms or a binomial.</li><li>Zoology, Botany: Consisting of or characterized by binomials.</li></ul>