Where does “dihedral” come from?
Dihedral comes from Ancient Greek διά (dia, "through") and δισα (disa, "twice"), derived from Proto-Indo-European dwís and dwóh₁, both meaning "two."
dihedral (English): An angle between two plane surfaces; The upward...
Definitions
- An angle between two plane surfaces; The upward...
Ancestry of “dihedral”, step by step
| Step | Language | Word | Meaning |
|---|---|---|---|
| 1 | English | -hedral | used to form adjectives describing related nouns... |
| 2 | English | -ál | Of or pertaining to. Adjectival suffix appended to various words, often nouns, to produce an adjective form. Often added to words of Latin origin, but used with other words also |
| 3 | English | aldehyde | Any of a large class of reactive organic... |
| 4 | German | Aldehyd | aldehyde |
| 5 | Latin | alcohol | kohl, collyrium, stibium; any other powder... |
| 6 | Andalusian Arabic | كُحُول | — |
| 7 | Arabic | كحل | antimony; kohl, stibnite; black coloring of the... |
| 8 | Arabic | كُحْل | antimony; kohl, stibnite |
| 9 | Akkadian | guḫlum | kohl, antimony paste |