[het-er-uh-sahy-klik, -sik-lik] /ˌhɛt ər əˈsaɪ klɪk, -ˈsɪk lɪk/
of or relating to the branch of chemistry dealing with compounds in which at least one of the ring members is not a carbon atom (contrasted with ).
noting such compounds, as ethylene oxide, C 2 H 4 O.
(of an organic compound) containing a closed ring of atoms, at least one of which is not a carbon atom Compare homocyclic
heterocyclic het·er·o·cy·clic (hět’ə-rō-sī’klĭk, -sĭk’lĭk)
Containing more than one kind of atom joined in a ring.
Of or relating to a compound containing a closed ring structure made of more than one kind of atom. Pyridine (C5H5N), for example, is a heterocyclic compound, as its ring contains five carbon atoms and one nitrogen atom. Compare homocyclic.
[het-er-uh-sist] /ˈhɛt ər əˌsɪst/ noun, Bacteriology. 1. one of the enlarged nitrogen-fixing cells occurring along the filaments in some blue-green algae.
heterocytotropic het·er·o·cy·to·trop·ic (hět’ə-rō-sī’tə-trŏp’ĭk, -trō’pĭk) adj. Having an affinity for cells of a different species. Used of an antibody.
- Heterocytotropic antibody
heterocytotropic antibody n. A cytotropic antibody similar in activity to a homocytotropic antibody but having affinity for cells of a different species.
[het-uh-roh-dak-tuh-luh s] /ˌhɛt ə roʊˈdæk tə ləs/ adjective, Ornithology. 1. having the first and fourth toes directed backward, and the second and third forward, as in trogons. /ˌhɛtərəʊˈdæktɪl/ adjective 1. (of the feet of certain birds) having the first and second toes directed backwards and the third and fourth forwards noun 2. a bird with […]