‘仰角’ (yǎng jiǎo) is a technical noun meaning ‘angle of elevation’—the angle formed between the horizontal plane and the line of sight when looking upward from an observer to a higher object. The first character, 仰 (yǎng), means ‘to look up’ or ‘to raise one’s head’, conveying upward orientation; the second, 角 (jiǎo), means ‘angle’. Together, they literally denote ‘upward angle’.

This term is commonly used in mathematics, physics, surveying, astronomy, and engineering—for example, when calculating the height of a building using trigonometry, or determining the launch trajectory of a rocket. It is a formal, precise term not typically found in casual conversation, but essential in STEM education and technical documentation. Unlike everyday words for direction or position, 仰角 carries strict geometric definition and requires measurement with instruments like theodolites or inclinometers.