Scissors and shears are functionally the same. The word shears tends to be applied to larger units and the word scissors to smaller, but just how large something has to be before it is shears instead of scissors is not well defined. So one person may call it a scissors while another would call the same thing a shears.
Scissors are called 'des ciseaux' in French.
Fabric scissors are commonly referred to as sewing scissors or dressmaking scissors. They are specifically designed to cut through fabric cleanly and smoothly without causing fraying or damage to the material.
Those large scissors are likely shearing scissors, specifically designed for shearing sheep and other animals with thick wool. They are sharp and durable to make the shearing process efficient and safe for both the shearer and the animal. Proper maintenance and care are essential to keep the scissors in good working condition.
Forceps.
One possibility is the word shears.
Most Paramedics have a pair of scissors called TufCuts - they are very strong scissors ideal for cutting through clothes/seat belts etc.
According to the mockumentary "Rock, Paper, Scissors: The Way of the Tosser" (see http://www.imdb.com/title/tt1121964/) it's called "sicosnipophobia."
AllHeart is a great store to purchase medical scissors. They offer a variety of scientific related products, and they have a large selection of medical scissors available in a multitude of colours.
Scissors ? I suppose scissors was used during the French Revolution. But if you think about the device used to behead people : it is called the Guillotine.
They are called scissors, but you pronounce it like sisors.
No, it is not. The word "scissors" is a noun (and although it ends in an S, it is singular); in the sentence you are asking about, it would need an article. There are two ways to do this: if you are pointing it out by name, you would say, "It is a scissors." (It's not a rock, nor a tree, nor a knife. It's a scissors-- that's what it is called.) But if you are differentiating one pair of scissors it from others, you would say, "It is the scissors I borrowed from my sister."