1. A slender, needle-like structure or bristle found in plants, animals, or fungi.
Usage: technical; biology
2. In botany, a small needle-shaped leaf or leaf-like appendage.
Usage: technical; botany

Examples

• The moss displayed tiny aciculae under the microscope.
• Certain fungi produce aciculae as part of their reproductive structure.
• The plant's aciculae help reduce water loss in arid environments.
• Botanists identified the aciculae as a key distinguishing feature of the species.
• Under magnification, the aciculae appeared as delicate, pointed projections.