No, due to the fact that the "Bio" in bio-terrorism means biological, also meaning living organisms and as far as i know, there are no living organisms in tear gas or pepper spray or anything of the sort.
According to one expert the most common causes of minor knee pain are: strains, ligament tear, cartilage tear or osteoarthritis. If you have persistent knee pain you should get it properly diagnosed.
Wear and tear on a bone due to repetitive minor trauma (compression or traction)
Possible causes of the big tear in the fabric of the sofa could include sharp objects, excessive wear and tear, or pets scratching or chewing on the fabric.
Pegmatities
An Achilles tear, or more commonly know as a rupture, is when the tendon connecting your calf to your heel tears or ruptures. This can be a full tear which may require surgery, or a minor tear that can be treated nonsurgical. Go here for more info on treatment http://www.emedicinehealth.com/achilles_tendon_rupture/page5_em.htm
Lacrim- is the medical terminology combining form meaning tear. For instance, tear ducts are lacrimal ducts.
could be ovoid
Brett Favre has a tear in his biceps tendon. When that was repaired before signing with the Minnesota Vikings they also found out he also has a minor tear in his rotator cuff in his shoulder.
If you tear the anus, you could have bleeding, itching, and burning pain. You also risk serious infections.
tear up a kleenex
The combining form "dacryo-" refers to tears or the lacrimal glands and ducts associated with tear production and drainage. It is derived from the Greek word "dakryon," which means tear. This prefix is commonly used in medical terminology related to conditions or procedures involving tears or the tear system. For example, "dacryocystitis" refers to inflammation of the tear sac.
It's a tattoo. How could there be a real tear drop lingering on his face ALL THE TIME?