| HELIACAL | • heliacal adj. (Rare) Of or relating to the Sun, especially rising and setting with the sun. • heliacal adj. Of or relating to the rising of a star when it first becomes visible just before sunrise in the eastern… • HELIACAL adj. pertaining to the sun, also HELIAC. |
| HELIASTS | • heliasts n. Plural of heliast. • HELIAST n. (Greek) an Athenian judge. |
| HELICASE | • helicase n. (Biochemistry) An enzyme required for DNA unwinding. • HELICASE n. any of a group of enzymes that are able to separate the strands of the double-helix of a DNA molecule. |
| HELICITY | • helicity n. The quality of being helical. • helicity n. (Physics, fluid mechanics, electrodynamics) Any of certain measures of the extent to which vortex lines… • helicity n. (Physics, quantum mechanics) The quantized spin component of a moving particle along the direction of its motion. |
| HELICOID | • helicoid adj. Having the form of a flattened helix. • helicoid n. (Mathematics) A minimal surface in the form of a flattened helix. • HELICOID n. a type of geometrical curve, a flattened spiral. |
| HELICONS | • helicons n. Plural of helicon. • HELICON n. a large circular brass tuba that fits around the player's shoulder. |
| HELICOPT | • helicopt v. (Rare, dated, nonstandard) to helicopter. • HELICOPT v. to travel by helicopter. |
| HELIDECK | • helideck n. (Nautical) A platform (on a vessel or offshore structure) allowing helicopters to land and take off. • HELIDECK n. a landing deck for helicopters on a ship. |
| HELILIFT | • helilift v. (Transitive) To transport (troops) by helicopter. • helilift n. The operation of transporting troops by helicopter. • HELILIFT v. to transport by helicopter. |
| HELIODOR | • heliodor n. A richly coloured form of golden beryl found in southwest Africa. • HELIODOR n. (Greek) a variety of clear yellow beryl occurring in SW Africa. |
| HELIOSES | • helioses n. Plural of helios. • helioses n. Plural of heliosis. • HELIOSIS n. exposure to the sun. |
| HELIOSIS | • heliosis n. Sunstroke. • heliosis n. Sunburn. • heliosis n. Exposure to the sun. |
| HELIPADS | • helipads n. Plural of helipad. • HELIPAD n. a landing pad for helicopters. |
| HELIPORT | • heliport n. (Aviation) A facility, such as a small airport, designed to let helicopters take off and land. • HELIPORT n. an airport for helicopters, also HELISTOP. |
| HELISKIS | • heliskis v. Third-person singular simple present indicative form of heliski. • heli-skis v. Third-person singular simple present indicative form of heli-ski. • HELISKI v. to ski down mountains reached by helicopter. |
| HELISTOP | • helistop n. A place where a helicopter can land. • HELISTOP n. an airport for helicopters, also HELIPORT. |
| HELITACK | • HELITACK n. the use of helicopters to fight forest fires. |