Sinusitis is an inflammation of the sinuses. It is often caused by bacterial (germ) infection. Sometimes, viruses and fungi (molds) cause it. People with weak immune systems are more likely to develop bacterial or fungal sinus infection. Some people with allergies can have allergic fungal sinus infection. Acute sinus infection lasts three to eight weeks. A sinus infection lasting longer than eight weeks is considered chronic.
Define Upper stage. Upper stage synonyms, Upper stage pronunciation, Upper stage translation, English dictionary definition of Upper stage. n. A rocket composed of two or more propulsion units that fire in succession. Also called step rocket . Noun 1. multistage rocket - a rocket having two or...
Proscenium stage: A proscenium theatre is what we usually think of as a theatre. Its primary feature is the Proscenium, a picture frame placed around the front of the playing area of an end stage. The frame is the Proscenium; the wings are spaces on either side, extending off-stage.nything on the stage but out of the audience view is off-stage or backstage. Wings are the sides of the stage, and the Fly Loft or Scene House is the space above the stage. The floor is called the Deck. The part of the stage located downstage of the Proscenium is called the Apron, or sometimes the Thrust.