| Answer | Crossword Clue |
|---|---|
| TAU | Greek letter used as the symbol for torque |
| OMEGA | Letter used as a symbol for ohms |
| lemniscate | an oval shape with two symmetrical loops across a central node (as the figure 8), used as the symbol for infinity |
| lemniscates | LEMNISCATE, an oval shape with two symmetrical loops across a central node (as the figure 8), used as the symbol for infinity |
| pictographs | A pictorial symbol for a word or phrase. Pictographs were used as the earliest known form of writing, examples having been discovered in Egypt and Mesopotamia from before 3000 bc |
| pictograph | A pictorial symbol for a word or phrase. Pictographs were used as the earliest known form of writing, examples having been discovered in Egypt and Mesopotamia from before 3000 bc |
