[[Techoleg]] mân bethau ywtebyg '''Nanoroboteg''' e.e.i [[robot]]iaid neu [[beiriant|beiriannau]] bychain yw '''Nanoroboteg'''. Maent, fel yr awgryma'r eu henwenw, tua'r un faint â [[nano-gronyn|nano-ronyn]](10<sup>−9</sup> meters).<ref>{{cite journal |author= Vaughn JR. |title= ''Over the Horizon: Potential Impact of Emerging Trends in Information and Communication Technology on Disability Policy and Practice'' |journal=[http://www.ncd.gov/newsroom/publications/2006/emerging_trends.htm National Council on Disability], Washington DC. |pages=1–55 |year=2006}}</ref><ref>{{cite journal |author= Ghosh, A., Fischer, P. |title= ''Controlled Propulsion of Artificial Magnetic Nanostructured Propellers'' |journal= Nano Letters |volume=9 |issue=6 |pages=2243–2245 |year=2009 |doi=10.1021/nl900186w |pmid= 19413293}}</ref><ref>{{cite journal |author= Sierra, D. P., Weir, N. A., Jones, J. F. |title= ''A review of research in the field of nanorobotics'' |journal=[http://www.energy.gov U.S. Department of Energy] - Office of Scientific and Technical Information Oak Ridge, TN |volume=SAND2005-6808 |pages=1–50 |year=2005 |doi=10.2172/875622}}</ref>
Yn benodol, nanoroboteg ydy'r ddisgyblaeth o gynllunio ac adeiladu "nanorobotiaid" gyda dyfeisiadau er mwyn gwneud rhyw job o waith penodol; maent rhwng 0.1–10 micrometr o ran maint ac wedi'u creu o gydrannau [[moleciwl]]aidd.<ref>{{cite journal |author= Tarakanov, A. O., Goncharova, L. B., Tarakanov Y. A. |title= Carbon nanotubes towards medicinal biochips |journal= Wiley Interdisciplinary Reviews: Nanomedicine and Nanobiotechnology |volume=2 |issue=1 |pages=1–10 |year=2009 |doi=10.1002/wnan.69}}</ref><ref>{{cite journal |author= Ignatyev, M. B. |title= Necessary and sufficient conditions of nanorobot synthesis |journal= Doklady Mathematics |volume=82 |issue=1 |pages=671–675 |year=2010 |doi=10.1134/S1064562410040435}}</ref>
