Alternative spelling of radio nebula

(taxonomy) A name that has been protected by the International Commission for Zoological Nomenclature and is valid to be used although it is known it does not comply with the requirements of the In...

(intransitive, often with into or through) To force oneself (in a particular direction). / (agriculture, intransitive, of a cow or heifer) To be in heat; to be ready for mating with a bull.

plural of topic