11-letter words containing p, e, a, r, t
- wrist plate — a platelike part of a mechanism, oscillating in its own plane, to which links or rods are attached by pins.
- xanthophore — a chromatophore containing a yellow pigment, as in some cold-blooded animals.
- xi particle — any of a family of baryons having strangeness −2 and isotopic spin ½. Symbol: Ξ.
- xiphisterna — Plural form of xiphisternum.
- zebra plant — any of several plants having conspicuously striped or veined foliage, as Calathea zebrina, of Brazil.
- zooparasite — any parasitic animal or protozoan.
- zooplankter — an individual animal or animallike organism in plankton.