Aciculae

Part of speech: noun

Definitions

1. A small, needle-like structure or object often found in biological contexts, such as a needle or a sharp, slender part of a plant
2. A term used in anatomy to describe microscopic or minute projections that resemble needles or spikes
3. Referring to tiny, slender forms that may serve a specific function in various organisms or natural substances

Etymology: "Aciculae" is the plural of "acicula", a Latin diminutive of "acus", meaning "needle" or "pin". The Latin word "acicula" meant a pin for a head-dress, and it was taken into English without any change to its spelling, which is why the plural keeps the Latin ending "-ae" rather than English "-s". Its use in biology follows the same logic: a naturalist describing a tiny, slender spine or bristle reached for the Latin diminutive to name it. The Latin base "acus" also gives English "acupuncture" and "acute", both drawn from the idea of a sharp point. Here the "-cula" ending does the work of making the needle small, so the term carries the sense of "little needle" in one neat unit.

Synonyms: needles, spines, points, prickles, quills