18-letter words containing a, g, r, i, p
- universal coupling — a coupling between rotating shafts set at an angle to one another, allowing for rotation in three planes.
- vectorcardiography — a method of determining the direction and magnitude of the electrical forces of the heart.
- whispering gallery — a space or gallery beneath a dome or broad arch in which low sounds produced at any of certain points are clearly audible at certain other distant points.
- wildlife programme — (esp on television) a documentary whose subject is wild animals in their natural habitat or undomesticated fauna and flora generally