16-letter words containing h, i, t, r
- haversian system — a Haversian canal and the series of concentric bony plates surrounding it.
- hawksbill turtle — a sea turtle, Eretmochelys imbricata, the shell of which is the source of tortoise shell: an endangered species.
- headhunting firm — a recruiting agency
- headmistressship — (rare) Alternative form of headmistress-ship.
- health authority — a government agency that is responsible for NHS care in a particular area
- health inspector — a public employee who inspects places such as restaurants, shops, factories etc to make sure they are hygienic and do not pose any dangers to health
- health insurance — insurance that compensates the insured for expenses or loss incurred for medical reasons, as through illness or hospitalization.
- heat of reaction — the heat evolved or absorbed when one mole of a product is formed at constant pressure
- heat prostration — heat exhaustion.
- heating engineer — a person whose job is to install and maintain equipment used for heating buildings
- heavier-than-air — (of an aircraft) weighing more than the air that it displaces, hence having to obtain lift by aerodynamic means.
- heir presumptive — a person who is expected to be the heir but whose expectations may be canceled by the birth of a nearer heir.
- heliotherapeutic — Pertaining to heliotherapy.
- hematocrit-value — a centrifuge for separating the cells of the blood from the plasma.
- hematocrystallin — (biology, archaic) hemoglobin.
- hemicorporectomy — (surgery) The surgical procedure which cuts through the spine and removes the lower half of the body from the waist down.
- hemorrhoidectomy — the surgical removal of hemorrhoids.
- hemotherapeutics — hemotherapy.
- herman hollerith — (person) The promulgator of the punched card. Hollerith was born on 1860-02-29 and died on 1929-11-17. He graduated from Columbia University, NewYork, NY, USA. He joined the US Census Bureau as a statistician where he used a punched card device to help analyse the 1880 US census data. This punched card system stored data in 80 columns. This "80-column" concept has carried forward in various forms into modern applications. In 1896, Hollerith founded the Tabulating Machine Company to exploit his invention and in 1924 his firm became part of IBM. The Hollerith system was used for the 1911 UK census. A correspondant writes: Wasn't Hollerith's original machine first used for the 1990 US census? And I think I am right in saying that the physical layout was a 20x12 grid of round holes. The one I have seen (picture only, unfortunately, not the real thing) did not use 'columns' as such but holes were grouped into irregularly-shaped fields, such that each hole had a more-or-less independent function.
- hermaphroditical — Alternative form of hermaphroditic.
- hermitian matrix — Mathematics. a matrix, whose entries are complex numbers, equal to the transpose of the matrix whose entries are the conjugates of the entries of the given matrix.
- heroin addiction — addiction to the drug heroin
- herpes genitalis — genital herpes.
- heterometabolism — insect development in which the young hatch in a form very similar to the adult and then mature without a pupal stage
- heteromultimeric — (biochemistry) Describing a protein containing two or more different polypeptide chains.
- heteropalindrome — Something that spells something else when reversed, a semordnilap.
- heterosuggestion — Suggestion from outside.
- hierophantically — In a hierophantic manner; in the manner of a hierophant.
- high court judge — a judge who sits in the High Court
- high wire artist — a performer of a high-wire act
- high-pass filter — a filter that allows high-frequency electromagnetic signals to pass while rejecting or attenuating others below a specific value.
- high/great hopes — If you have high hopes or great hopes that something will happen, you are confident that it will happen.
- higher criticism — the study of the Bible having as its object the establishment of such facts as authorship and date of composition, as well as determination of a basis for exegesis.
- higher education — education beyond high school, specifically that provided by colleges and graduate schools, and professional schools.
- hippocratic oath — an oath embodying the duties and obligations of physicians, usually taken by those about to enter upon the practice of medicine.
- historical novel — a novel within the genre of historical fiction.
- historiographies — Plural form of historiography.
- hit a brick wall — unable to continue or make progress because of a hindrance
- hit one's straps — to achieve one's full potential or become fully effective
- hit one's stride — to walk with long steps, as with vigor, haste, impatience, or arrogance.
- hit-and-run raid — a raid relying on surprise allied to a rapid departure from the scene of operations for the desired effect
- holder condition — Lipschitz condition.
- holier-than-thou — obnoxiously pious; sanctimonious; self-righteous.
- homeric laughter — loud, hearty laughter, as of the gods.
- hopfield network — (artificial intelligence) (Or "Hopfield model") A kind of neural network investigated by John Hopfield in the early 1980s. The Hopfield network has no special input or output neurons (see McCulloch-Pitts), but all are both input and output, and all are connected to all others in both directions (with equal weights in the two directions). Input is applied simultaneously to all neurons which then output to each other and the process continues until a stable state is reached, which represents the network output.
- horizon distance — Television. the distance of the farthest point on the earth's surface visible from a transmitting antenna.
- horizontal plane — flat surface parallel to the horizon
- horizontal union — a labor union organized by skills or trades of its members rather than by industries.
- horseradish tree — a tropical tree, Moringa pterygosperma, having fragrant white flowers and seeds yielding a commercially useful oil.
- horsetail agaric — the shaggy-mane.