1. shaped like a needle or slender pointed structure; having a sharp, needle-like form
Usage: chiefly botanical and zoological

Examples

• The plant's aciculate leaves resembled tiny needles.
• Botanists identified the species by its aciculate leaf structure.
• The insect's aciculate antennae were barely visible to the naked eye.
• Under the microscope, the crystal formations appeared aciculate.
• The aciculate spines of the cactus provided excellent protection.