| bi-leaflet valve | A low profile mechanical heart valve that is less obstructive to outflow, especially in small size. (05 Mar 2000) |
|---|---|
| bimolecular | Involving two molecules, as in a bimolecular reaction. (05 Mar 2000) |
| bimolecular step | <chemistry> Two species are reacting and form the transition state (09 Jan 1998) |
| leaflet | One of the ultimate segments of a compound leaf. (09 Oct 1997) |