What is the meaning of Sturt?

In an embryo, an angle equal to two gons. If a mosaic forms in the embryo, the line passes between two organs with a probability, in percent, equal to the number of sturts between them.

disturbance; annoyance; care

A bargain in tribute mining by which the tributor profits.

To vex; to annoy; to startle.

To start with fear.

Source: wiktionary.org