1. Related to plants or animals or crystals having aciculae or needlelike parts

See also: acicula

• piperin
• piperine
• piperocaine
• piperocaine hydrochloride
• pipestem clematis
• pipestone
• pipet
• pipette
• pipework
• pipewort
• pipewort family
• Pipidae
• Pipile
• Pipilo
• Pipilo erythrophthalmus
• piping
• piping crow
• piping crow-shrike
• piping guan
• piping plover
• pipistrel
• pipistrelle
• Pipistrellus
• Pipistrellus pipistrellus
• Pipistrellus subflavus