Subtotal means partial. So a subtotal amputation of the right external ear means part of the ear was removed - usually due to injury or some times due to necrosis of ear tissue (not the inner ear). Sometimes this is done to remove cartilage in the ear to reduce its size and the ear is also pulled back some so a person does not have to suffer the indignity of having large ears that stick out too far.
Amputation?
Amputation means taking a limb off.
BK is often seen in a fuller form BKA, meaning below-knee amputation.
The medical term for absence of the external ear is "anotia." This condition involves complete absence of the external ear.
I presume that you are talking about external cephalic version
Extraoral is the medical term meaning outside the mouth.
outer ear
Palpation is the medical term meaning using the sense of touch to examine the patient.
Cervicectomy and trachelectomy both mean surgical removal of the cervix.
Amputation
Laceration is defined as a smooth, incision-like cut. Amputation is defined as a total removal of an appendage. Partial amputation is self explanatory. An avulsion is defined as a cut resulting in a flap of flesh. De-gloving is a complete removal of the soft tissues of an appendage.
Ectoparasites are external parasites. Lice or fleas are examples.