See first quotes from Christopher Anvil
| contragravity n. | 1965 Plateau in Amazing Stories Mar. 71/2 You have endless power, can control atomic and molecular structure, process metals, set up impenetrable barriers, create contragravity, [etc.]. |
| gravitically adv. | 1958 Foghead in Astounding Science Fiction Sept. 43/2 THIS AMOUNTS TO ITS BEING CORRECTLY POSITIONED GRAVITICALLY…IF NOT LEVEL IT CANNOT FUNCTION. |