| hacking | A chopping stroke made with the edge of the hand in massage. (05 Mar 2000) |
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| hackle | 1. To separate, as the coarse part of flax or hemp from the fine, by drawing it through the teeth of a hackle or hatchel. 2. To tear asunder; to break in pieces. "The other divisions of the kingdom being hackled and torn to pieces." (Burke) Origin: Hackled; Hackling. Source: Websters Dictionary (01 Mar 1998) |
| hackly | 1. Rough or broken, as if hacked. 2. <chemical> Having fine, short, and sharp points on the surface; as, the hackly fracture of metallic iron. Origin: From Hackle. Source: Websters Dictionary (01 Mar 1998) |
| hackmatack | <botany> The American larch (Larix Americana), a coniferous tree with slender deciduous leaves; also, its heavy, close-grained timber. Synonym: tamarack. Origin: Of American Indian origin. Source: Websters Dictionary (01 Mar 1998) |
| haddie | <zoology> The haddock. Source: Websters Dictionary (01 Mar 1998) |
| haddock | <zoology> A marine food fish (Melanogrammus aeglefinus), allied to the cod, inhabiting the northern coasts of Europe and America. It has a dark lateral line and a black spot on each side of the body, just back of the gills. Galled also haddie, and dickie. Norway haddock, a marine edible fish (Sebastes marinus) of Northern Europe and America. See Rose fish. Origin: OE. Hadoc, haddok, of unknown origin; cf. Ir. Codog, Gael. Adag, F. Hadot. Source: Websters Dictionary (01 Mar 1998) |
| hade | <chemical> The inclination or deviation from the vertical of any mineral vein, fault, or lode. Origin: Cf. Heald inclined, bowed down, G. Halde declivity. Source: Websters Dictionary (01 Mar 1998) |
| Hadfield, Geoffrey | <person> British physician, *1889. See: Clarke-Hadfield syndrome. (05 Mar 2000) |
| hadron | <physics> Any of over 100 elementary particles that are the building blocks of atomic particles such as protons and neutrons. (09 Oct 1997) |
| hadrosaurus | <paleontology> An American herbivorous dinosaur of great size, allied to the iguanodon. It is found in the Cretaceous formation. Origin: NL, fr. Gr. "adros thick + say^ros lizard. Source: Websters Dictionary (01 Mar 1998) |
| Hadrurus | A genus of scorpions found in the southwestern U.S., characterised by numerous setae on the stinger; the commonest species is Hadrurus arizonensis, the olive hairy scorpion. See: Scorpionida. Origin: G. Hadros, thick, stout, + ouro, tail (05 Mar 2000) |
| Haeckel's gastrea theory | That the two-layered gastrula is the ancestral form of all multicellular animals. Synonym: gastrea theory. (05 Mar 2000) |
| Haeckel's law | The theory formulated by E.H. Haeckel that individuals in their embryonic development pass through stages similar in general structural plan to the stages their species passed through in its evolution; more technically phrased, the theory that ontogeny is an abbreviated recapitulation of phylogeny. Synonym: biogenetic law, law of biogenesis, Haeckel's law, law of recapitulation. (05 Mar 2000) |
| Haeckel, Ernst | <person> German naturalist, 1834-1919. See: Haeckel's gastrea theory, Haeckel's law. (05 Mar 2000) |
| haem | 1. <biochemistry> Compounds of iron complexed in a porphyrin (tetrapyrrole) ring that differ in side chain composition. Haems are the prosthetic groups of cytochromes and are found in most oxygen carrier proteins. 2. <prefix> haem-, eaning relating to blood. Origin: G. Haima (21 Jun 2000) |