Anagrams of: SR_

• Requesting silence.

• term of address for a man

• a title used before the name of knight or baronet

• the network in the reticular formation that serves an alerting or arousal function

• a widely distributed system consisting of all the cells able to ingest bacteria or colloidal particles etc, except for certain white blood cells

• a room in a hospital or clinic staffed and equipped to provide emergency care to persons requiring immediate medical treatment

• a trivalent metallic element of the rare earth group; occurs with yttrium

• a state in south central United States; one of the Confederate states during the American Civil War

• a unit of surface area equal to 100 square meters

• a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere

• the 9th letter of the Roman alphabet

• a nonmetallic element belonging to the halogens; used especially in medicine and photography and in dyes; occurs naturally only in combination in small quantities (as in sea water or rocks)

• the smallest whole number or a numeral representing this number

• the 9th letter of the Roman alphabet

• used of a single unit or thing; not two or more