needle

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noun

Definition of NEEDLE

1

a slender hollow instrument by which material is put into or taken from the body through the skin <the nurse inserted the needle into his vein and collected some blood for testing>

Synonyms hype [slang], hypodermic, hypodermic needle, hypodermic syringe, syringe

2

an arrow-shaped piece on a dial or scale for registering information <simply by reading the compass needle you should be able to figure out in which direction we're heading>

Synonyms hand, index, indicator, needle

Related Words dial, face, gauge (also gage)