| Term | Description |
| Jelloped | Said of the comb and gills of the cock when of a different color from the body. (Also written jowlopped.) |
| Jessant | Springing up or shooting forth, as a plant. Also applied to an animal, in the same sense as issuant |
| Jessant-de-lis | Used to describe the head of a leopard having a fleur-de-lis passing through it |
| Jessed | Having jesses on. (Said of a hawk.) The jesse, used in falconry, was a short strap of leather or silk with which hawks were tied by the leg and on which the leash was attached. |