| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Estrogen receptor negative (ER-) | Religion | Breast cancer cells that do not have a protein (receptor molecule) to which estrogen will attach. Breast cancer cells that are ER- do not need the hormone estrogen to grow and usually do not respond to hormone (antiestrogen) therapy that blocks these receptor sites. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
