Crissal is an adjectival word that describes something that relates to the feathers that are located under the tails of birds, also known as crissa. These feathers form the cover that surrounds the cloacal opening.
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what is the definition of crissal
Advice (also called exhortation) is a form of relating personal or institutional opinions, belief systems, values, recommendations or guidance about certain situations relayed in some context to another...