Very sharp; as sharp as a needle / (of a sound) very high-pitched.

plural of touch-needle

A small bar of gold and silver, either pure, or alloyed in some known proportion with copper, for testing the purity of gold or silver articles by comparison of the streaks made by the article and the bar on a touchstone.

(dated) The garfish. / The pipefish

plural of sea needle

(idiomatic) To find harmony or strike a balance between conflicting forces, interests, etc. Normally used to indicate the difficulty of doing so; also, sarcastically, for a failed attempt.

A game in which children stand in a row, joining hands, and in which the outer one, still holding his neighbour, runs between the others.

a magnetic needle suspended at its center of gravity, and moving freely in a vertical plane, so as to indicate on a graduated circle the magnetic dip or inclination

plural of knitting needle

plural of darning needle