The ends of the fingers; the most sensitive parts of human digits used for fine touch discrimination. Often used metaphorically to describe having something readily available or within easy reach.
Compound of 'finger' from Old English 'finger' and 'tip' from Middle English, meaning the pointed end. The metaphorical sense of 'at one's fingertips' emerged in the early 20th century.
Human fingertips contain about 3,000 touch receptors per square inch, making them more sensitive than most scientific instruments for detecting texture and pressure. The phrase 'at your fingertips' perfectly captures how these remarkable appendages extend our reach and capability into the world.
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