1. shaped like a needle or pin; slender and pointed
Usage: commonly used in biology, geology, and botany

Examples

• The acicular leaves of the pine tree are adapted to reduce water loss.
• Geologists identified acicular crystals of tourmaline in the rock sample.
• The acicular spines of the cactus protect it from predators.
• Under the microscope, the acicular structure of the mineral was clearly visible.
• Many coniferous trees have acicular foliage that persists through winter.