(ISS, space science, US) Initialism of Russian Orbital Segment. (the part of the International Space Station that was contributed by Russia, or using ROSCOSMOS/Mir specification-based modules)

(abbreviation) Abbreviation of reactive oxygen species. / (abbreviation) Robot Operating System, a robotic middleware

Initialism of Rights of Survivorship. Synonym of JWROS

plural of ro-ro

A diminutive of the female given name Rosalind. / A diminutive of the female given name Rosamund.

(transport, nautical) Abbreviation of roll-on roll-off. / An individual vehicle of this kind.

Initialism of reverse osmosis. / Initialism of restraining order. / (postal) Initialism of receiving office.

Abbreviation of Rondônia, A state of Brazil.

(zoology) Filled with roe.

In secret or covertly; privately, confidentially.