1. the interaction of elements that when combined produce a total effect that is greater than the sum of the individual elements, contributions, etc.; synergism.

2. Physiology, Medicine/Medical: the cooperative action of two or more muscles, nerves, or the like.

3. Biochemistry, Pharmacology: the cooperative action of two or more stimuli or drugs.

Etymology: from New Latin synergia, from Greek sunergos.




1. Latin: “tree of life”.

2. Neuroanatomy: the cerebellar white matter in the brain, so called for its branched, tree-like appearance. It brings sensory and motor information to and from the cerebellum.

3. Female reproduction: “arbor vitæ uteri” a part of the canal of the cervix.

4. Victorian slang: the penis.




1. of, relating to, or resembling a bull, i.e. an uncastrated male bovine animal.


2. a colourless crystalline substance, C2H7NO3S, formed by the hydrolysis of taurocholic acid and found in the fluids of the muscles and lungs of many animals.

Etymology: from Latin taurīnus, from taurus "a bull".




1. a Christian festival, observed on January 6, commemorating the manifestation of Christ to the gentiles in the persons of the Magi; Twelfth-day.

 2. an appearance or manifestation, especially of a deity.

3. a sudden, intuitive perception of or insight into the reality or essential meaning of something, usually initiated by some simple, homely, or commonplace occurrence or experience.

4. a literary work or section of a work presenting, usually symbolically, such a moment of revelation and insight.

Etymology: Middle English epiphanie < Late Latin epiphanīa < Late Greek epipháneia, επιφάνεια, “the appearance; miraculous phenomenon”.