Diamond-like; chemical structures or systems (especially nanomachines as envisioned originally by Eric K. Drexler) based on diamond derivatives and/or stiff carbon bonds.
Diamondoid materials are extensively used for building purposes, as they are strong under tension, and under compression; pure diamond itself is brittle, but aggregate materials are both stronger and more flexible.
Examples of diamondoid include pure diamond (in particular nanoassembled perfect crystalline diamond), Adamant, graphene, carbon nanotubes, aggregated carbon nanorods, pandifico and diamondoid computronium.
Many drytech devices are constructed of diamondoid components, including devices down to the nanoscale level. Some computing devices (such as rod-logic computers) are largely constructed of diamondoid. The so-called Diamond Network AI entities are so-named because many or most of the early individuals in that empire used diamondoid computronium almost exclusively; today this is no longer the case, but the name is retained for historical reasons.