18-letter words containing h, y, l, o, m
- publishing company — a firm which publishes books
- pyromucic aldehyde — furfural.
- random walk theory — the theory that the future movement of share prices does not reflect past movements and therefore will not follow a discernible pattern
- rheims-douay bible — Douay Bible.
- september holidays — a period of time in September when people do not have to go to school, college or work
- sling psychrometer — a psychrometer so designed that the wet-bulb thermometer can be ventilated, to expedite evaporation, by whirling in the air.
- sodium hyposulfite — sodium thiosulfate.
- spherical geometry — the branch of geometry that deals with figures on spherical surfaces.
- stockholm syndrome — an emotional attachment to a captor formed by a hostage as a result of continuous stress, dependence, and a need to cooperate for survival.
- stoichiometrically — of or relating to stoichiometry.
- stokely carmichael — Hoagland Howard [hohg-luh nd] /ˈhoʊg lənd/ (Show IPA), ("Hoagy") 1899–1981, U.S. songwriter and musician.
- the family compact — the ruling oligarchy in Upper Canada in the early 19th century
- the same old story — the familiar or regular course of events
- three-body problem — the problem of calculating the motions of three bodies in space moving under the influence of only their mutual gravitational attraction.
- wesleyan methodist — a member of any of the churches founded on the evangelical principles of John Wesley.
- withdrawal symptom — effects of stopping a drug
- zermelo set theory — (mathematics) A set theory with the following set of axioms: Extensionality: two sets are equal if and only if they have the same elements. Union: If U is a set, so is the union of all its elements. Pair-set: If a and b are sets, so is {a, b}. Foundation: Every set contains a set disjoint from itself. Comprehension (or Restriction): If P is a formula with one free variable and X a set then {x: x is in X and P(x)}. is a set. Infinity: There exists an infinite set. Power-set: If X is a set, so is its power set. Zermelo set theory avoids Russell's paradox by excluding sets of elements with arbitrary properties - the Comprehension axiom only allows a property to be used to select elements of an existing set.