This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. The act or process of investigating.

n. A detailed inquiry or systematic examination. See Synonyms at inquiry.

n. The act of investigating; the process of inquiring into or following up; research; study; inquiry, especially patient or thorough inquiry or examination; as, the investigations of the philosopher and the mathematician; the investigations of the judge, the moralist.

n. The act of investigating; the process of inquiring into or following up; research; study; inquiry, esp. patient or thorough inquiry or examination

n. The act of investigating; the making of a search or inquiry; detailed or particularized examination to ascertain the truth in regard to something; careful research.

n. Synonyms Inquisition, Inquiry, etc. (see examination); overhauling, probing. See inference.

n. the work of inquiring into something thoroughly and systematically

n. an inquiry into unfamiliar or questionable activities

"One of the fundamental characteristics of striated muscle, and the one involving the greatest difficulty in investigation, is the great rapidity with which changes take place in it."

unit of investigation   

research    study    examination    scrutiny    search    overhauling    scrutation    perscrutation    inquisition    indagation   

Alsatian    Americanization    Appalachian    Balkanization    Christianization    Confederation    Corp.    Croatian    Dalmatian    Desegregation   

inquiry    investigations    examination    research    analysis    discussion    survey    observation    explanation    assessment