| barrel |
the quantity that such a vessel can hold, used as a unit of capacity, varying from thirty-one to forty-two gallons in the United States. (abbr.: bbl.) [1/6 definitions] |
| bbl. |
abbreviation of "barrel," or "barrels," a unit of capacity, varying from thirty-one to forty-two gallons in the United States. |
| cadmium |
a chemical element that has forty-eight protons in each nucleus and occurs in various compounds or in pure form as a soft bluish white metal. (symbol: Cd) |
| D layer |
the lowest layer of the ionosphere, about forty-five to eighty miles above the earth. |
| face cord |
a unit of volume used for fuel wood, equal to about to one third of a cord, or about forty cubic feet. |
| fiftieth |
indicating rank or position between forty-ninth and fifty-first. [2/3 definitions] |
| fortieth |
indicating rank or position between thirty-ninth and forty-first. [3 definitions] |
| forty |
(pl.) the period of one's life from age forty through age forty-nine. [2/5 definitions] |
| forty-five |
a forty-five caliber pistol or revolver, or a cartridge of .45 inches in diameter to be used in such a gun. [2/3 definitions] |
| French Academy |
an association of forty scholars and writers devoted to maintaining the purity of the French language and establishing rules of usage. |
| full-time |
involving or working the standard number of working hours per week, typically forty hours in the U.S. |
| harp |
a large musical instrument that consists of an upright triangular frame fitted with forty-six strings of graduated lengths, played by plucking with the fingers. [1/4 definitions] |
| ichthyosaur |
any of an extinct variety of marine reptiles that had four flippers, a dolphinlike head, and a vertical caudal fin, and that ranged in length from four to forty feet. |
| indium |
a chemical element that has forty-nine protons in each nucleus and that occurs as a very soft silvery metal, often used for plating other metals and glass for mirrors. (symbol: In) |
| Lent |
the forty weekdays from Ash Wednesday to Easter, observed by Christians as a period of fasting, penitence, and other self-denial. |
| middle age |
the period of human life between youth and old age, approximately the years between forty and sixty-five. |
| molybdenum |
a chemical element that has forty-two protons in each nucleus and that occurs as a very hard, dense, silver-white solid metal that is often alloyed with other metals, esp. iron, to increase their hardness. (symbol: Mo) |
| monte |
a card game played with a deck of forty cards in which a player selects two of four cards and bets that one will be matched by the dealer before the other. |
| niobium |
a chemical element that has forty-one protons in each nucleus and that occurs in pure form as a dense, soft, shiny bluish white solid metal, used esp. in alloys of steel to add strength; columbium. (symbol: Nb) |
| oblique |
of military march, at an angle of forty-five degrees. [1/5 definitions] |
| octant |
a navigational instrument like the sextant but with an angle of only forty-five degrees. [2/4 definitions] |