17-letter words containing d, h, i

spiny-headed worm — any of a small group of endoparasites of the phylum Acanthocephala, as larvae parasitic in insects and crustaceans and as adults in various vertebrates.
spondylolisthesis — the forward displacement of a vertebra.
spruce gall aphid — any of various homopterous insects of the family Adelgidae, as Adelges abietis (spruce gall aphid) and Pineus pinifoliae (pine leaf aphid) that feed and form galls on conifers.
st. swithin's day — July 15, superstitiously regarded as a day that, should it rain or be fair, will be followed by 40 consecutive days of like weather.
stannous chloride — a white, crystalline, water-soluble solid, SnCl 2 ⋅2H 2 O, used chiefly as a reducing and tinning agent, and as a mordant in dyeing with cochineal.
statutory holiday — a public holiday; a holiday all workers are entitled to
straw in the wind — If you say that an incident or piece of news is a straw in the wind, you mean that it gives an indication of what might happen in the future.
striped killifish — a killifish, Fundulus majalis, of the Atlantic coast of the U.S., the female of which is marked with black stripes.
stymphalian birds — a flock of predacious birds of Arcadia that were driven away and killed by Hercules as one of his labors.
sulfonyl chloride — a colorless liquid, SO 2 Cl 2 , having a very pungent odor and corrosive to the skin and mucous membranes: used as a chlorinating or sulfonating agent.
swaddling clothes — cloth for wrapping around a baby
tay-sachs disease — a rare fatal hereditary disease, occurring chiefly in infants and children, especially of eastern European Jewish origin, characterized by a red spot on the retina, gradual blindness, and paralysis.
teacher education — training to become a teacher, usually at an institution of higher education
technical drawing — the study and practice, esp as a subject taught in school, of the basic techniques of draughtsmanship, as employed in mechanical drawing, architecture, etc
terephthalic acid — a white, crystalline, water-insoluble solid, C 8 H 6 O 2 , the para isomer of phthalic acid: used chiefly in the manufacture of resins and textile fibers.
the confederation — the original 13 states of the United States of America constituted under the Articles of Confederation and superseded by the more formal union established in 1789
the driver's seat — the position of control or dominance
the evil day/hour — If someone is putting off the evil day or the evil hour, they have to do something unpleasant and are trying to avoid doing it for as long as possible.
the faint-hearted — people of a nervous disposition
the humber bridge — a single-span suspension bridge (1981) that crosses the Humber, with a main span of 1410 m (4626 ft)
the life and soul — a person regarded as the main source of merriment and liveliness
the little dipper — a small faint constellation, the brightest star of which is the Pole Star, lying 1° from the true celestial pole
the outside world — You can use the outside world to refer to all the people who do not live in a particular place or who are not involved in a particular situation.
the right side of — in favour with
the silken ladder — a one-act opera by Rossini, telling the story of Giulia, who is secretly married to Dorvil; he visits her bedroom every night by climbing up a ladder made of silk. Giulia's guardian, Dormont, expects her to marry Blansac, but she introduces Blansac to her cousin Lucilla; after much confusion, the two couples are joyfully united
the tabloid press — (considered as a whole) newspapers with pages about 30 cm (12 inches) by 40 cm (16 inches), usually characterized by an emphasis on photographs and a concise and often sensational style
therapeutic index — the ratio between the dosage of a drug that causes a lethal effect and the dosage that causes a therapeutic effect.
thermal diffusion — the separation of constituents, often isotopes, of a fluid under the influence of a temperature gradient.
thermal radiation — electromagnetic radiation emitted by all matter above a temperature of absolute zero because of the thermal motion of atomic particles.
thermoperiodicity — the effect on an organism of rhythmic fluctuations in temperature.
thiopental sodium — a barbiturate, C 11 H 18 N 2 NaO 2 S, used as an anesthetic in surgery and, in psychiatry, for narcoanalysis and to stimulate recall of past events.
thiosulfuric acid — an acid, H 2 S 2 O 3 , that may be regarded as sulfuric acid with one oxygen atom replaced by sulfur.
third commandment — “Thou shalt not take the name of the Lord thy God in vain”: third of the Ten Commandments.
third-degree burn — a burned place or area: a burn where fire had ripped through the forest.
three mile island — an island in the Susquehanna River, near Middletown, Pennsylvania, SE of Harrisburg: scene of a near-disastrous accident at a nuclear plant in 1979 that raised the issue of nuclear-energy safety.
three-dimensional — having, or seeming to have, the dimension of depth as well as width and height.
tibetan highlands — Tibet, Plateau of.
to have a mind to — If you have a mind to do something, you want, intend, or choose to do it.
to play the field — If someone plays the field, they have a number of different romantic or sexual relationships.
to strike a chord — If something strikes a chord with you, it makes you feel sympathy or enthusiasm.
to the bitter end — If you say that you will continue doing something to the bitter end, especially something difficult or unpleasant, you are emphasizing that you will continue doing it until it is completely finished.
to win hands down — If you win hands down, you win very easily.
triskaidekaphobia — fear or a phobia concerning the number 13.
trucial sheikdoms — an independent federation in E Arabia, formed in 1971, now comprising seven emirates on the S coast (formerly, Pirate Coast or Trucial Coast) of the Persian Gulf, formerly under British protection: Abu Dhabi, Dubai, Sharjah, Ajman, Umm al-Qaiwain, Ras al-Khaimah (joined 1972), and Fujairah. About 32,300 sq. mi. (83,657 sq. km). Capital: Abu Dhabi. Abbreviation: U.A.E.
uncomprehendingly — to understand the nature or meaning of; grasp with the mind; perceive: He did not comprehend the significance of the ambassador's remark.
under the sign of — during that portion of the year when the sun is passing through and thus subject to the influence of (a specified sign of the zodiac)
undistinguishable — to mark off as different (often followed by from or by): He was distinguished from the other boys by his height.
utmost good faith — a principle used in insurance contracts, legally obliging all parties to reveal to the others any information that might influence the others' decision to enter into the contract
vaginal discharge — emission from the female genitalia
veiltail goldfish — an artificially bred, indoor variety of goldfish, usually golden or calico and of a spheroid shape, having a fully divided, drooping tail fin exceeding the body in length.

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