Causes. Retroperitoneal fibrosis occurs when extra fibrous tissue forms in the area behind the stomach and intestines. The tissue forms a mass (or masses) that can block the tubes that carry urine from the kidney to the bladder.
noun /naÊn/ n a word or group of words that refers to a person, place, or thing or any syntactically similar word (as modifier): a noun phraseAbbreviation: N, n Related adjective(s): nominal Etymology: 14th Century: via Anglo-French from Latin nÅmen name. Ënounal adj.
Phonics on the Web Plural Nouns. A noun is a type of word which refers to a person, place, or thing. Nouns can be conjugated in either singular or plural form. A singular noun refers to just one person, place, or thing (for example, a bat or a ship).A plural noun refers to multiple people, places, or things (for example, bats or ships). The majority of English count nouns are regular and predictable in the spelling of the plural form 1. singular noun refers to just one person, place, or thing (for example, a bat or a ship). A plural noun refers to multiple people, places, or things (for example, bats or ships). The majority of English count nouns are regular and predictable in the spelling of the plural form 1.