Stepfather
The husband of a woman who had a child by another man.
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- Steppage gait
A manner of walking in which the advancing foot is lifted high so that the toes clear the ground. Steppage gait is a sign of foot-drop.
- Stereotactic
Referring to precise positioning in three-dimensional space. For example, biopsies, surgery, or radiation therapy can be done stereotactically.
- Stereotactic needle biopsy
A biopsy in which the spot to be biopsied is located three-dimensionally, the information is entered into a computer, and the computer calculates the information and positions a needle to remove the biopsy sample.
- Stereotactic radiotherapy
Radiation therapy in which a number of precisely aimed beams of ionizing radiation coming from different directions meet at a specific point, delivering the radiation treatment to that spot.
- Stereotactic surgery
Surgery in which a system of three-dimensional coordinates is used to locate the site to be operated on.