| heterochrony | Lack of synchronisation. (18 Nov 1997) |
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| heterocladic | Denoting an anastomosis between branches of different arterial trunks, as distinguished from homocladic. Origin: hetero-+ G. Klados, a twig (05 Mar 2000) |
| heteroclite | Deviating from ordinary forms or rules; irregular; anomalous; abnormal. Origin: L. Heteroclitus, Gr.; other + to lean, incline, inflect: cf. F. Heteroclite. 1. A word which is irregular or anomalous either in declension or conjugation, or which deviates from ordinary forms of inflection in words of a like kind; especially, a noun which is irregular in declension. 2. Any thing or person deviating from the common rule, or from common forms. Source: Websters Dictionary (01 Mar 1998) |
| heteroclitical | Deviating from ordinary forms or rules; irregular; anomalous; abnormal. See: Heteroclite. Source: Websters Dictionary (01 Mar 1998) |
| heterocrine | Denoting the secretion of two or more kinds of material. Origin: hetero-+ G. Krino, to separate (05 Mar 2000) |
| heterocrisis | Rarely used term for an irregular crisis, one occurring at an abnormal time or with unusual symptoms. (05 Mar 2000) |
| heterocyclic compound | Any compound in which the constituent atoms, or any part of them, form a ring. Used mainly in organic chemistry where: 1) numerous compound's contain rings of carbon atoms (carbocyclic compound's) or carbon atoms plus one or more atoms of other types (heterocyclic compound's), usually nitrogen, oxygen, or sulfur; 2) where the atoms in the ring are all of the same element (homocyclic or isocyclic compound); 3) where the ring is saturated or contains nonconjugated double bonds (alicyclic compound), the compound is similar in properties to the corresponding acyclic compound (e.g., cyclohexane resembles hexane); 4) where the ring contains conjugated double bonds in a closed loop in which there are 4n + 2 (where n is an integer) delocalised π electrons (Huckel's rule) (aromatic compound; e.g., benzene, pyridine), it is more stable than the corresponding saturated ring and exhibits unusual chemical properties characteristic of itself and not of other types of rings or of acyclic compound's. These aromatic compounds have the ability to sustain an induced ring current. Synonym: closed chain compound, ring compound. (05 Mar 2000) |
| heterocyclic compounds | Ring compounds having atoms other than carbon in their nuclei. (12 Dec 1998) |
| heterocyclic compounds with 4 or more rings | A class of organic compounds containing four or more ring structures, one of which is made up of more than one kind of atom, usually carbon plus another atom. The heterocycle may be either aromatic or nonaromatic. (12 Dec 1998) |
| heterocyclic compounds, 1-ring | A class of organic compounds containing a ring structure made up of more than one kind of atom, usually carbon plus another atom. The ring structure can be aromatic or nonaromatic. (12 Dec 1998) |
| heterocyclic compounds, 2-ring | A class of organic compounds containing two ring structures, one of which is made up of more than one kind of atom, usually carbon plus another atom. The heterocycle may be either aromatic or nonaromatic. (12 Dec 1998) |
| heterocyclic compounds, 3-ring | A class of organic compounds containing three ring structures, one of which is made up of more than one kind of atom, usually carbon plus another atom. The heterocycle may be either aromatic or nonaromatic (12 Dec 1998) |
| heterocyclic compounds, bridged-ring | A class of organic compounds which contain two rings that share a pair of bridgehead carbon atoms. (12 Dec 1998) |
| heterocyclic oxides | Oxides of a ring compound having atoms other than carbon in its ring. (12 Dec 1998) |
| heterocyst | <biology> Specialised cell type found at regular intervals along the filaments of certain Cyanobacteria, site of nitrogen fixation. (18 Nov 1997) |
Synonyms : Heterogeneous Nuclear Ribonucleoprotein Particle K Protein, dC-Stretch-Binding Protein, hnRNP K, hnRNP K Protein, Heterogeneous Nuclear Ribonucleoprotein K, Ribonucleoprotein K, Heterogeneous-Nuclear, dC Stretch Binding Protein
Synonyms : hnRNP L, Heterogeneous Nuclear Ribonucleoprotein L, Ribonucleoprotein L, Heterogeneous-Nuclear
Synonyms : GRIP120, Glucocorticoid Receptor Interacting Protein 120, Scaffold Attachment Factor A (SAF-A), hnRNP U, hnRNP U Protein, Heterogeneous Nuclear Ribonucleoprotein U, Ribonucleoprotein U, Heterogeneous-Nuclear
Synonyms : Heterogeneous Nuclear Ribonucleoprotein, Informatin, Informofer, hnRNP, hnRNP Complexes, hnRNP Particles, hnRNP Proteins, Complexes, hnRNP, Heterogeneous Nuclear Ribonucleoproteins, Nuclear Ribonucleoprotein, Heterogeneous, Particles, hnRNP
Synonyms : Metagonimus yokogawai, Yokogawa's Fluke
| heterogenesis |
alternation of generations: the alternation of two or more different forms in the life cycle of a plant or animal
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| heterograft |
tissue from an animal of one species used as a temporary graft (as in cases of severe burns) on an individual of another species
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| heterologous |
not corresponding in structure or evolutionary origin derived from organisms of a different but related species; "a heterologous graft"
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| heteroploid |
(genetics) an organism or cell having a chromosome number that is not an even multiple of the haploid chromosome number for that species
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| heterosexual |
a heterosexual person; someone having a sexual orientation to persons of the opposite sex sexually attracted to members of the opposite sex
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| HET | 1 species: toyon |
|---|---|
| HET | ornamental evergreen treelike shrub of United States Pacific coast having large white flowers and red berrylike fruits |
| HET | (of an insect) undergoing incomplete metamorphosis in which the nymph is essentially like the adult and there is no pupal stage |
| HET | (of an insect) undergoing incomplete metamorphosis in which the nymph is essentially like the adult and there is no pupal stage |
| HET | small New World burrowing mouselike rodents with fur-lined cheek pouches and hind limbs and tail adapted to leaping |
| HET | two words are heteronyms if they are spelled the same way but differ in pronunciation (e.g. `bow') |
| HET | an antibody found in the blood of someone suffering from infectious mononucleosis |
| HET | a blood test to detect heterophil antibodies that agglutinate sheep red blood cells |
| HET | an antibody found in the blood of someone suffering from infectious mononucleosis |
| HET | (genetics) an organism or cell having a chromosome number that is not an even multiple of the haploid chromosome number for that species |
| HET | the condition of being heteroploid |
| HET | true bugs |
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