Hi,
The term 'igneous' comes from the Latin language and is the word for 'fire,' which is a very appropriate name due to the fact that igneous rocks originate from fiery, red-hot magma. The deeper in the crust the minerals cool, the larger they can grow.
Plutonic Rocks- Plutonic rocks cool deep below the surface, and are generally coarse texture.
Volcanic rocks- They erupt on the surface, and are usually fine-grained, frequently with bubbles or vesicles.
Hypabyssal- It is a loose term for rocks that cool at shallow depths. They are often porphyritic, meaning they have large crystals in a fine-grained rock mass.
Hope it helps you...
(Answered by Benjemin)