| 1 | German | Plankton | plankton |
| 2 | Ancient Greek | πλαγκτόν | neuter nominative singular of πλαγκτός; neuter... |
| 3 | Ancient Greek | πλαγκτός | wandering, roaming; wandering in mind, erring,... |
| 4 | Ancient Greek | πλάζω | to turn away from; to bewilder, dull the mind; to... |