the chemical symbol for erbium, a rare earth element. It has atomic number 68 and an atomic weight of 167.26.
a trivalent metallic element of the rare earth group; occurs with yttrium
Endoplasmic Reticulum
Entity Relationship
Estrogen Receptor
Extended Range
a room in a hospital or clinic staffed and equipped to provide emergency care to persons requiring immediate medical treatment
Er (Р, р) is the eighteenth letter of the Cyrillic alphabet. It was developed from the Greek letter Rho. Er looks exactly the same as the upper case Rho.
This article contains a summary of the first season of the American fictional drama television series ER.
