Repair Center: The ancient center of Ringworld repair, maintenance, and control, housed beneath the Map of Mars on the Great Ocean.

Rishathra (reshtra, etc.): Sexual practice outside ones own species but within the intelligent hominids.

Scrith: Ringworld structural material. Scrith underlies all the terraformed and contoured inner surface of the Ringworld. The rim walls are also of scrith. Very dense, with a tensile strength on the order of the force that holds an atomic nucleus together.

Sheathclaws: A world held by humans and Kzinti together.

Spill mountains: Mountains standing against the rim wall, the outflow of the rim spillpipes. One stage in the circulation of flup.

Spin or Spinward: In the direction of rotation of the Ringworld. (Against the rotation of the sky.)

Starboard: To the right as one looks spinward.

Stasis field: Human technology. An induced state in which time passes very slowly. Ratios can be as high as a billion years of real time to a few seconds in stasis. An object in stasis is very nearly invulnerable.

Stepping disks: Puppeteer technology, an advanced form of teleportation.

Stet: Leave it alone; accept as written; make no change; restore.

Tanj: An expletive, once shorthand for "There aint no justice."

Thruster: Reactionless drive. In human space, thrusters have generally replaced fusion rockets on all spacecraft save warcraft.

Vishnishtee (Vashneesht, Vasnesht, Vasneesit, etc.): Wizard or protector.

Webeye: Puppeteer technology, a multisensory transmitter.

Weenie plant: Ubiquitous Ringworld plant. Edible.

2893 A.D.