| Gabor, Dennis (1900–79) | Fisikawan Britania Raya kelahiran Kekaisaran Austria-Hongaria yang memenangkan Penghargaan Nobel dalam Fisika pada 1971 untuk penemuan dan pengembangannya pada metode holografis |
| gagap | |
| galaksi | |
| galaksi aktif | |
| galaksi elips | |
| galaksi gelap | |
| Galileo Galilei (1564–1642) | |
| galon | |
| Galvani, Luigi (1737–98) | |
| galvanometer | |
| galvanometer astatis | |
| galvanometer balistik | |
| gambar | |
| gangguan | |
| ganja | |
| garam | |
| garam | |
| garam fosfonium | |
| garam kasar | |
| Garam Rochelle | |
| Garam Zeise | |
| garis dasi | |
| Garis Fraunhofer | |
| garis isodinamik | |
| garis isogonal | |
| garis penundaan | |
| garis tanggal internasional | |
| Garis-D | |
| gas | |
| gas air | |
| gas alam | |
| gas alam cair | |
| gas elektrolitik | |
| gas ideal | |
| gas ketawa | |
| gas kilang | |
| gas kota | |
| gas langka | |
| gas minyak cair | |
| gas mulia | |
| gas mustard | |
| gas nyata | |
| gas pembawa | |
| gas permanen | |
| gas produsen | |
| gas rawa | |
| gas sempurna | |
| gas sintesis | |
| gauss | |
| Gauss, Karl Friedrich (1777–1855) | |
| gaussmeter | |
| gaya antarmolekul | |
| gaya dispersi | |
| gaya gerak listrik | |
| gaya sentrifugal | |
| gaya sentripetal | |
| Gay-Lussac, Joseph Louis (1778–1850) | |
| gebi- | |
| Gegenschein | |
| Geiger, Hans Wilhelm (1882–1945) | |
| gel | |
| gelar | |
| gelas air | |
| gelas berputar | |
| Gell-Mann, Murray (1929–) | |
| gelombang elektromagnetik | |
| gelombang gravitasi | |
| gelombang ionosfer | |
| gelombang kejut | |
| gelombang kontinyu | |
| gelombang mikro | |
| gelombang pembawa | |
| gelombang submillimetre | |
| gelombang tanah | |
| gema | |
| gempa bumi | |
| generator | |
| Generator Cockcroft – Walton | |
| generator elektrostatis | |
| generator homopolar | |
| geodesi | |
| geodesik | |
| geodinamika | |
| geofisika | |
| geomagnetisme | |
| geometri analitik | |
| geometri diferensial | |
| geo-neutrino | |
| geraham | |
| Gerak harmonis | |
| gerak langsung | |
| Gerakan Brown | |
| gerbang | |
| gerhana | |
| gesekan | |
| getah | |
| getaran kisi | |
| GeV | |
| Gibbs, Josiah Willard (1839–1903) | |
| gibi- | |
| giga- | |
| gigih | |
| gilbert | |
| Gilbert, William (1544–1603) | |
| gimbal | |
| giroskop | |
| Glaser, Donald Arthur (1926–2013) | |
| glueball | |
| gluino | |
| gluon | |
| GPS | |
| gradien | |
| grafik | |
| Graham, Thomas (1805–69) | |
| gram | |
| graphene | |
| graticule | |
| gravitasi | |
| gravitasi | |
| graviton | |
| grup luar angkasa | |
| grup mercapto | |
| grup pentil | |
| gubernur | |
| gugus | |
| gugus bola | |
| gugus galaksi | |
| Gula | |
| gula malt | |
| gula nonreducing | |
| gula pereduksi | |
| gula susu | |
| gula timbal | |
