A stylized female head WordNet 3.0 & Open English WordNet

Each of the standard therbligs is represented by its own conventional stylized symbol. For example the therblig for "search" consists of two intersecting curves representing an eye, with a third curve in one corner suggesting looking sideways in searching, whereas the therblig for "find" shows a similar two curves, but with a central circle suggesting that the eye is looking directly at a found object. Wiktionary