| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Horse nostril fly | Medicine | A small fly whose larvae are parasites of the horse, the adult female fly depositing them into and around the nostrils, from where they later migrate to the pharynx or larynx of their host. Source: European Union. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
