Mineralogy Terminology

noun a regular oval shape, traced by a point moving in a plane so that the sum of its distances from two other points (the foci) is constant, or resulting when a cone is cut by an oblique plane that does not intersect the base

• The shape of the orbit of a planet around the sun is an ellipse.
• I drew an ellipse for the base of the vase I'm designing.
• That oval-shaped pool is actually an ellipse.
• Her path to success was not a straight line but more of an ellipse, with ups and downs along the way.

adjective referring to someone who is stubbornly unyielding or immovable in their opinions or beliefs

• The scientist was adamantive in his belief that the results of the experiment were accurate.
• She's pretty adamantive about wanting to go to that concert.
• He's so adamantive about his favorite sports team, it's almost annoying.
• Her love for animals is adamantive, she would do anything to protect them.