A sill is an intrusive rock formation. These formations occur when magma solidifies underground and then intrudes into the overlying rock formation. They are distinct from similarly formed domes and dikes because sills are horizontal to the surface.
The Papanicolaou test (abbreviated as Pap test, known earlier as Pap smear, cervical smear, or smear test) is a method of cervical screening used to detect potentially pre-cancerous and cancerous processes in the cervix (opening of the uterus or womb). Pap smear is performed by opening the vaginal canal with a speculum, then collecting cells at the outer opening of the cervix at the transformation zone (where the outer squamous cervical cells meet the inner glandular endocervical cells).
A Pap smear is a test of the cells obtained from the cervix of the female. The cervix is the part of the uterus that extends into the vagina. This test is named after Dr. George Papanicolaou who invented the technique.The Pap smear has been in widespread use since the 1950's and is one factor in the drop of cervical cancer rates by over 70% since its introduction.he most recent guidelines recommend the first Pap smear at age 21, and every two years during the 20's. After age 30, Pap smears can be every 3 years if accompanied by a negative HPV test. These guidelines are for women who have never had an abnormal Pap smear.