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| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| they (ðeɪ) | |
| —pron | |
| 1. | refers to people or things other than the speaker or people addressed: they fight among themselves |
| 2. | refers to unspecified people or people in general not including the speaker or people addressed: in Australia they have Christmas in the summer |
| 3. | not standard refers to an indefinite antecedent such as one, whoever, or anybody: if anyone objects, they can go |
| 4. | an archaic word for those : blessed are they that mourn |
| usage It was formerly considered correct to use he, him, or his after pronouns such as everyone, no-one, anyone, or someone as in everyone did his best, but it is now more common to use they, them, or their, and this use has become acceptable in all but the most formal contexts: everyone did their best | |
| case | SINGULAR | - | - | PLURAL |
| - | masc. | neut. | fem. | (all genders) |
| nom. | he | hit | heo, hio | hie, hi |
| acc. | hine | hit | hie, hi | hie, hi |
| gen. | his | his | hire | hira, heora |
| dat. | him | him | hire | him, heom |
He
The symbol for the element helium.
| helium (hē'lē-əm) Pronunciation Key
Symbol He A very lightweight, colorless, odorless element in the noble gas group. Helium occurs in natural gas, in radioactive ores, and in small amounts in the atmosphere. It has the lowest boiling point of any substance and is the second most abundant element in the universe. Helium is used to provide lift for balloons and blimps and to create artificial air that will not react chemically. Atomic number 2; atomic weight 4.0026; boiling point -268.9°C; density at 0°C 0.1785 gram per liter. See Periodic Table. Our Living Language : The second most abundant element in the universe after hydrogen, Helium (symbol He) is a colorless, odorless, nonmetallic gas that is produced abundantly by the nuclear fusion in all stars and is found in smaller amounts on Earth. It was discovered by the British scientist—and founding editor of the journal Nature—Joseph Norman Lockyer in 1868, while he was studying a solar eclipse with a spectroscope, an instrument that breaks light up into a spectrum. If an element is heated up enough to glow, the emitted light produces a unique spectrum when refracted through a prism. Lockyer noticed that the spectrum of the Sun's corona, which is visible only during a solar eclipse, contained lines produced by an unknown element. He named the element helium from helios, the Greek word for "sun." Helios gives us many other words pertaining to the Sun, such as heliocentric and perihelion. |