1. The overground drive for a reciprocating piston pump installed at a borehole (e.g. an oil well)
   - nodding donkey

Encyclopedia: Pump jack

• velvet grass
• velvet osier
• velvet plant
• velvet sumac
• velvet worm
• velvet-textured
• velveteen
• velvetleaf
• velvetweed
• velvety
• velvety-furred
• velvety-haired
• velvety-plumaged
• velvety-skinned
• vena
• vena anastomotica
• vena angularis
• vena appendicularis
• vena arcuata renis
• vena auricularis
• vena axillaris
• vena azygos
• vena basalis
• vena basilica
• vena basivertebralis