tellurium Tellurium is a chemical element with atomic number 52 and the symbol Te. It is a brittle, silver-white metalloid. It is rather rare on earth, but more abundant in the cosmos as a whole. Tellurium is chiefly used in copper and steel alloys to improve machineability and in solar panels
holy mackerel / holy X “Holy mackerel” is what is called a minced oath, a phrase where an offensive term is replaced with a non-offensive one. In this case, turning a potentially blasphemous utterance into a silly or humorous one. There are a number of “holy X” ones: holy cow, holy Moses, and holy smoke
equinox / equilux The Encyclopedia of Astronomy & Astrophysics defines equinox as: An instant at which the Sun crosses the celestial equator; the Sun is then vertically overhead at the equator, and day and night have equal duration at every point on the Earth’s surface. The apparent annual path of the Sun
technetium Technetium is a chemical element with atomic number 43 and the symbol Tc. It is the lightest element with no stable isotopes and the first element to be artificially produced. The name comes from the Greek τεχνητός (technetos), meaning artificial. Technetium is used as a tracer chemical in medical testing
kibosh / put the kibosh on To put the kibosh on something means to stop or end it. There have been any number of proposed origins for the word and phrase, but only one of them has any substantial evidence to support it, and that is that kibosh come from the Turkish qirbach, or kurbash in
hotshot Perhaps the most common sense of hotshot today is that of a very capable person, especially one who is brash and flashy, but the word has had a variety of meanings over the centuries. The underlying metaphor underneath all the senses, however, is that of a bullet, warm from having
tantalum Tantalum is a chemical element with atomic number 73 and the symbol Ta. It is a hard, ductile, blue-gray transition metal. It has a high melting point and is corrosion resistant and relatively inert chemically, making it useful in reaction vessels, jet engines, nuclear reactors, and in capacitors for electronic
trek / Trekkie / Trekker Trekker and Trekkie mean the same thing, but have different connotations. Both refer to fans of the science fiction television show, and now movie franchise, Star Trek, which started airing on American television in 1966. The two terms are sometimes differentiated, however, in that a Trekker is a more serious
nova / supernova Today, novas and supernovas (or supernovae) are considered to be distinct phenomenon. But prior to the 1930s, the term nova was applied to both. In current usage, nova occurs in binary star systems consisting of a white dwarf star and a larger star where the white dwarf is accreting material,
sulfur Sulfur is a chemical element with atomic number 16 and the symbol S. It is a yellow, crystalline solid at room temperature. By mass, it is the tenth most abundant element in the universe and the fifth most abundant on earth. It has been known since antiquity but only recognized
troop / troops / trooper A troop is a unit of people, most often soldiers, especially a unit of cavalry, but it is also used for other groups of people collected in bands, such as entertainers (in which case it is usually spelled troupe). It is also used for a group of animals, especially apes
nepotism / nepo baby Nepo baby is slang for a child of a famous person who achieves professional success based on who their parents are. The term is from nepo[tism] + baby, and nepotism is from the Latin nepos (nephew) + -ism. The word nepotism begins to appear in English in 1669 with the publication
