protoplanetary disk
[ prō′tə-plăn′ĭ-tĕr′ē ]
A rotating disk of dust and gas that surrounds the core of a developing solar system. It may eventually develop into orbiting celestial bodies such as planets and asteroids. See more at planetesimal.
Words nearby protoplanetary disk
protopathic sensibility,
protopectin,
protophilic,
protophloem,
protoplanet,
protoplanetary disk,
protoplasm,
protoplasmic astrocyte,
protoplast,
protopodite,
protopope