A railway yard where trains are assembled from individual carriages or goods wagons.

calisaya (Cinchona spp.)

(pharmacology) Yellow oxide of mercury suspended in water; a mixture prepared by adding corrosive sublimate to limewater.

copiapite

Ajuga chamaepitys, a flowering plant of the family Lamiaceae.

A card written as a thank you to someone, usually in response to receiving a gift or having been invited to attend an event.

plural of yellow Sally

(fishing) A greenish or yellowish European stonefly of the genus Chloroperla. / A critically endangered stonefly, Isogenus nubecula, presumed extinct in the UK after 1995 but rediscovered in 2017.

(chemistry) Mercury(II) oxide

plural of yellow Sally