Where does “biplanetary” come from?

biplanetary (English) comes from English bi, from English biceps, from Latin biceps, from Latin bis, from Latin color, from Ancient Greek μέτρον, from Ancient Greek -τρον, from Proto-Hellenic -tron — Derives agent nouns from verbs, denoting someone...

biplanetary (English): Involving two planets

Definitions

  1. Involving two planets

Ancestry of “biplanetary”, step by step

biplanetary traces back through two separate lines of ancestry.

via English bi

StepLanguageWordMeaning
1EnglishbiBisexual; A bisexual person; A type of jade disk...
2EnglishbicepsAny muscle having two heads; Specifically, the...
3Latinbicepsdouble-headed, having two heads; having two...
4Latinbistwice, two times, on two occasions, in two ways
5Latincolorcolour, shade; color; pigment; complexion
6Ancient Greekμέτρονsomething used to measure: measure, rule, weight;...
7Ancient Greek-τρονForms instrument nouns
8Proto-Hellenic-tronForms instrument nouns from verb stems
9Proto-Indo-European-tromForms nouns denoting a tool or instrument
10Proto-Indo-European-tḗrDerives agent nouns from verbs, denoting someone...

via English planetary

StepLanguageWordMeaning
1EnglishplanetaryOf, or relating to planets, or the orbital motion...
2EnglishplanetEach of the seven major bodies which move...
3Middle EnglishplaneteEach of the seven celestial bodies which move...
4Old Frenchplaneteplanet
5Latinplanētaplanet (wandering star)
6Ancient Greekπλανήτηςwanderer, vagabond; planet; a fever that comes in...
7Ancient Greek-τήςAppended to verbs to form agent nouns
8Ancient Greekπεῖραtrial, experiment, attempt
9Proto-Indo-Europeanper-before, in front; first; to go through
10Proto-Indo-Europeanpr̥tóspassed , crossed
Every word from Proto-Indo-European -tḗr