(chemistry) A transitional structure, in an energetically excited state, that forms between the reactants of a chemical reaction and breaks down to form the products

(chemistry) A complex hydride, such as sodium borohydride, containing a hydride ligand bonded to a central atom.

(chemistry) an organometallic compound formed from cyclopentadiene (or a derivative) and a transition element or other metal

a hydrido complex

(US) a set of buildings containing many apartments and ancillary functions

(medicine) A series of graphical deflections on a typical electrocardiogram that represents the electrical changes generated by the depolarization of the heart ventricles.

(chemistry) Any of several forms in which three different molecules are tightly bound together

(psychoanalysis) In Freudian theory, the complex of emotions aroused in a child by an unconscious sexual desire for the parent of the opposite sex.

Alternative form of coordination compound

(chemistry) A coordination compound.