| BISCUITIEST | • BISCUITY adj. like a biscuit in texture. |
| BISECTIONAL | • bisectional adj. Of, pertaining to, or obtained by bisection. • BISECTIONAL adj. relating to bisection. |
| BISECTRICES | • bisectrices n. Plural of bisectrix. • BISECTRIX n. the bisector of the angle between the optic axes of a crystal. |
| BISEXUALISM | • bisexualism n. Bisexuality. • BISEXUALISM n. being bisexual. |
| BISEXUALITY | • bisexuality n. (Of humans or other animals) The state of being sexually or romantically attracted to members of either sex or gender. • bisexuality n. (Chiefly botany) The state of being bisexual (“having both male and female parts or roles”). • BISEXUALITY n. the state of being bisexual. |
| BISHOPBIRDS | • BISHOPBIRD n. a genus of African weaverbird, the males of which have black plumage marked with red or yellow. |
| BISHOPESSES | • bishopesses n. Plural of bishopess. • BISHOPESS n. a female bishop. |
| BISHOPWEEDS | • BISHOPWEED n. goutweed. |
| BISOCIATION | • bisociation n. (Psychology) A blending of elements drawn from two previously unrelated patterns of thought into a new pattern. • BISOCIATION n. the association of an object with two or more ideas. |
| BISOCIATIVE | • BISOCIATIVE adj. relating to bisociation, the association of an object with two or more ideas. |
| BISSEXTILES | • bissextiles n. Plural of bissextile. • BISSEXTILE n. the extra day in the leap year. |
| BISULPHATES | • bisulphates n. Plural of bisulphate. • BISULPHATE n. a salt containing double the proportion of the acid radical present in a sulphate, also BISULFATE. |
| BISULPHIDES | • bisulphides n. Plural of bisulphide. • BISULPHIDE n. a sulphide having two atoms of sulphur in the molecule, also BISULFIDE. |
| BISULPHITES | • bisulphites n. Plural of bisulphite. • BISULPHITE n. a salt or ester of sulphurous acid containing the monovalent group, also BISULFITE. |
| BISYMMETRIC | • bisymmetric adj. (Mathematics, of a square matrix) Symmetric about both of its main diagonals. • BISYMMETRIC adj. showing symmetry in two planes at right angles to each other, also BISYMMETRICAL. |