Relating to or of the nature of a crunode; describing a point where a curve intersects itself at right angles or with two distinct tangent lines.
From crunode (from Medieval Latin crux 'cross' + nodus 'knot') + -al (adjectival suffix). The term is specialized mathematical vocabulary first used in geometry and calculus.
In mathematics, a crunode is where a curve crosses itself like an infinity symbol turned sideways—it's the kind of precise technical term that lets mathematicians describe shapes in a single elegant word!
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