| Subject | English | Norwegian Bokmål |
| bot. | dark-red helleborine | raudflangre (Epipactis atrorubens (Hoffm.) Besser; Epipactis atropurpurea Raf.; Epipactis rubiginosa (Crantz) Gaudin; Helleborine atropurpurea (Raf.) Schinz & Thell.) |
| fish.farm. | red algae | rødalge |
| bot. | red bartsia | engraudtopp (Odontites vulgaris Moench; Odontites ruber Pers. ex Besser; Odontites ruber Pers. ex Besser ssp. serotinus (Lam.) Vollm.; Odontites serotinus Dumort.; Odontites vernus (Bellardi) Dumort. ssp. pumilus (Nordst.) A. Pedersen; Odontites vernus (Bellardi) Dumort. ssp. serotinus (Lam.) Corb.; Odontites vernus (Bellardi) Dumort. var. pumilus (Nordst.) Hyl.; Odontites vernus (Bellardi) Dumort. var. tescarius (Johanss.) Hyl.) |
| bot. | red bartsia | åkerraudtopp (Odontites vernus (Bellardi) Dumort.; Odontites ruber Pers. ex Besser ssp. vernus (Bellardi) Vollm.) |
| bot. | red bartsia | strandraudtopp (Odontites litoralis (Fr.) Fr.; Odontites ruber Pers. ex Besser ssp. litoralis (Fr.) Hyl.; Odontites vernus (Bellardi) Dumort. ssp. litoralis (Fr.) Nyman; Odontites litoralis (Fr.) Fr. var. balticus O. A. Eklund ex Markl.; Odontites simplex (Hartm.) Krok) |
| bot. | red-berried elder | raudhyll (Sambucus racemosa L.) |
| comp., MS | red/black tree | rødt/svart tre (A binary search tree which uses a one-bit flag on each node to identify the node by color: either red or black. A set of constraints on node color helps form an approximately balanced binary tree) |
| comp., MS | Red Book audio | lydformatet Red Book (A standard compact disc format developed by Philips and Sony) |
| comp., MS | Red Book audio format | lydformatet Red Book (A standard compact disc format developed by Philips and Sony) |
| fish.farm. | red bream | brudefisk (Beryx decadactylus) |
| bot. | red campion | rød jonsokblom (Silene dioica (L.) Clairv.; Lychnis dioica L.; Melandrium dioicum (L.) Coss. & Germ.; Melandrium rubrum (Weigel) Garcke; Melandrium silvestre (Schuhr) Röhl) |
| fish.farm. | red caviar | laksekaviar |
| bot. | red clover | raudkløver (Trifolium pratense L.) |
| bev. | red curaçao | rød curaçao |
| bev. | red/dark grape juice | rød/mørk druejuice |
| bev. | red/dark grape juice | rød/mørk druesaft |
| bot. | red dead-nettle | raudtvitann (Lamium purpureum L.) |
| bot. | red fescue | raudsvingel (Festuca rubra L.; Festuca cryophila V. I. Krecz. & Bobrov; Festuca prolifera (Piper) Fernald; Festuca richardsonii Hook.; Festuca rubra L. f. prolifera (Piper) Hyl.; Festuca rubra L. var. fraterculae Rasm.; Festuca rubra L. var. mutica Hartm. (ssp. arctica); Festuca nigrescens Lam.; Festuca rubra L. ssp. fallax auct.; Festuca rubra L. var. fallax auct. (ssp. commutata); Festuca oelandica (Hack.) K. Richt.; Festuca rubra L. var. oelandica Hack. (ssp. oelandica)) |
| comp., MS | red gain | rød forsterkning (The factor by which the red pixel value has to be multiplied to achieve R=G=B values) |
| bot. | red goosefoot | raudmelde (Chenopodium rubrum L.) |
| comp., MS | red, green, blue, alpha | rød, grønn, blå, alfa (A model that augments the red, green, blue (RGB) method of combining colors in light-based media, with a fourth color component, alpha, which is used to control color blending. In Open GL, an alpha value of 1.0 corresponds to complete opacity and a value of 0.0 corresponds to complete transparency) |
| comp., MS | red-green-blue | rød-grønn-blå (A color model that describes color information in terms of the red (R), green (G), and blue (B) intensities that make up the color) |
| fish.farm. | red gurnard | tverrstripet knurr (Aspitrigla cuculus, chelidonichthys cuculus, Chelidonichthys kumu, currupiscis kumu) |
| bot. | red helleborine | raud skogfrue (Cephalanthera rubra (L.) Rich.) |
| bot. | red hemp-nettle | smaldå (Galeopsis angustifolia Ehrh. ex Hoffm.) |
| gen. | red herring | rkesild |
| bot. | red horned-poppy | raud hornvalmue (Glaucium corniculatum (L.) Rudolph) |
| bot. | red-leaved rose | doggrose (Rosa glauca Pourr.; Rosa ferruginea Vill.; Rosa rubrifolia Vill.) |
| environ. | red list The series of publications produced by the International Union for the Conservation of Nature and Natural Resources (IUCN). They provide an inventory on the threat to rare plants and animal species. Information includes status, geographical distribution, population size, habitat and breeding rate. The books also contain the conservation measures, if any, that have been taken to protect the species. There are five categories of rarity status: endangered species; vulnerable organisms, which are those unlikely to adapt to major environmental effects; rare organisms, which are those at risk because there are few of them in the world, such as plants which only grow on mountain peaks or on islands; out of danger species, which were formerly in the above categories, but have had the threat removed because of conservation actions; and indeterminate species, which are the plants and animals probably at risk, although not enough is known about them to assess their status | rødliste |
| bot. | red lungwort | raud lungeurt (Pulmonaria rubra Schott) |
| bot. | red nightshade | vengsøtvier (ssp. miniatum, Solanum villosum Mill.; Solanum luteum Mill.; Solanum alatum Moench; Solanum luteum Mill. ssp. alatum (Moench) Dostál; Solanum miniatum Bernh. ex Willd.; Solanum rubrum Mill.; Solanum villosum Mill. ssp. alatum (Moench) Edmonds; Solanum villosum Mill. ssp. puniceum (Kirschl.) Edmonds (ssp. miniatum)) |
| bot. | red oak | raudeik (Quercus rubra L.; Quercus borealis F. Michx.) |
| bot. | red pondweed | rusttjønnaks (Potamogeton alpinus Balb.) |
| bot. | red sedge | jøkulstorr (Carex rufina Drejer) |
| environ. | red tide Sea water which is covered or discoloured by the sudden growth of algal bloom or by a great increase in single-celled organisms, dinoflagellates. Red tides are often fatal to many forms of marine life and, in some cases, can result in human deaths because the dinoflagellates are eaten by clams and mussels which concentrate the paralysing toxins which they produce | dinoflagellatoppblomstring |
| bot. | red-tipped cudweed | gulgrå ullurt (Filago lutescens Jord.; Filago apiculata G. E. Sm. ex Bab.) |
| gen. | red wine | rødvin |
