Orbital
来自Big Physics
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mid 16th century (referring to the eye socket): probably from medieval Latin orbitalis, from Latin orbita (see orbit).
wiktionary
Borrowed from Medieval Latin orbitālis, from orbita(“a track or rut; a circuit, orbit”) + -ālis(“-al”, adjectival suffix), equivalent to orbit + -al. Doublet of orbitalis.
etymonline
orbital (adj.)
1540s, "of or pertaining to the eye socket;" 1839 with reference to heavenly bodies; from orbit (n.) + -al (1).
