Akademik

Dilatation
The process of enlargement or expansion. For example, dilatation of the eye is the process by which the pupil is temporarily enlarged with special (mydriatic) eye drops. This allows the eye care specialist to better view the inside of the eye. The word "dilation" means the same thing as "dilatation". Both come from the Latin "dilatare" meaning "to enlarge or expand."
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SYN: dilation.
- digital d. use of the finger or finger-tip to enlarge an orifice or opening, such as enlarging the orifice of a sclerosed mitral valve surgically.

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di·la·ta·tion .dil-ə-'tā-shən, .dī-lə- n
1) the condition of being stretched beyond normal dimensions esp. as a result of overwork or disease or of abnormal relaxation <\dilatation of the heart> <\dilatation of the stomach>
2) DILATION (2)

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n.
the enlargement or expansion of a hollow organ (such as a blood vessel) or cavity.

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dil·a·ta·tion (dil″ə-taґshən) 1. the condition, as of an orifice or tubular structure, of being dilated or stretched beyond the normal dimensions. 2. dilation (def. 1).

Medical dictionary. 2011.