1. Plural of acicula; small, needle-like or bristle-like structures in plants or animals.
Usage: technical; biology; botany; zoology

Examples

• The aciculae on the leaf surface help reduce water loss in desert plants.
• Biologists examined the aciculae of the sea urchin under the microscope.
• The moss displayed tiny aciculae that gave it a needle-like appearance.
• These aciculae serve as a defense mechanism against herbivores.
• The specimen's aciculae were characteristic of the species.