Best Answer: Heather gave you the correct answer. It stands for jumper due to the initials PJ on the old flight logs. However, today we only use the nickname PJ and the term Pararescuemen or Pararescueman to describe us.Pararescue Jumper is defunct. Yes, PJs actually jump. All PJs are basic airborne qualified and military free fall (HALO) qualified.he J stands for Jumper as in Air Force Pararescue Jumper. The term Pararescue Jumper is a retronym of the initials 'PJ' that were used on an Air Force Form 5 (Aircrew Flight Log) to identify anyone who is onboard in order to jump from the aircraft..
Definition of VIRION. : a complete virus particle that consists of an RNA or DNA core with a protein coat sometimes with external envelopes and that is the extracellular infective form of a virus.ADVERTISEMENT. French, from viri en viral (from virus virus) + -on 2 -on.First Known Use: 1959.edical Definition of VIRION. : a complete virus particle that consists of an RNA or DNA core with a protein coat sometimes with external envelopes and that is the extracellular infective form of a virus. Britannica.com: Encyclopedia article about virion.
Viroids are the smallest infectious pathogens known, consisting solely of short strands of circular, single-stranded RNA without protein coats. They are mostly plant pathogens, some of which are of economic importance.Viroid genomes are extremely small in size, ranging from 246 to 467 nucleobases.In comparison, the genome of the smallest known viruses capable of causing an infection by themselves are around 2,000 nucleobases in size. The human pathogen hepatitis D virus is a defective RNA virus similar to viroids.iroids were shown to consist of short stretches (a few hundred nucleobases) of single-stranded RNA and, unlike viruses, not to have a protein coat. Compared with other infectious plant pathogens, viroids are extremely small in size, ranging from 246 to 467 nucleobases; they thus consist of fewer than 10,000 atoms.