| Term | Definition | Contributor | Modified |
|---|---|---|---|
| Pyroxferroite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| pyroxine | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Pyroxmangite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Pyrrhol | No definition provided | Christopher Rauch | 2023.12.01 |
| Pyrrhotite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Pyrrol | No definition provided | Christopher Rauch | 2023.12.01 |
| Pyrrol, Physiological effect of | No definition provided | Christopher Rauch | 2023.12.01 |
| Pythagoras and Pythagorean school | No definition provided | Christopher Rauch | 2023.12.01 |
| Pythagorean proposition | No definition provided | Christopher Rauch | 2023.12.01 |
| Qandilite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Qaqarssukite (Ce) | No definition provided | Ryan McGranaghan | 2023.04.16 |
| qbo | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Qilianshanite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Q index | I5-minute index of geomagnetic activity for high-latitude (auroral) stations. After quiet diurnal variations are removed, Q is the largest deviation scaled from the undisturbed level for the two horiz ontal components. (This differs from the K index, which is scaled from the largest relative deviation.) The I5-minute periods are centered on the hour and at 15, 30, and 45 minutes past each hour. The range of Q is from 0 to 11; the upper limit, in nanotesla, for each index value is given below. Q = 0 1 2 3 4 5 6 7 8 9 10 11 10 20 40 80 140 240 400 660 1000 1500 2200 Unlimited | Ryan McGranaghan | 2023.04.16 |
| Qingheiite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Qitianlingite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Quack-grass | No definition provided | Christopher Rauch | 2023.12.01 |
| Quacks and quackery | No definition provided | Christopher Rauch | 2023.12.01 |
| Quadrant | No definition provided | Christopher Rauch | 2023.12.01 |
| Quadrants | No definition provided | Ryan McGranaghan | 2023.04.16 |