21-letter words containing h, e, n, l, y
- pentamethylenediamine — cadaverine.
- physically challenged — See example at challenged (def 1).
- pneumoencephalography — encephalography.
- polygenic inheritance — the heredity of complex characters that are determined by a large number of genes, each one usually having a relatively small effect.
- privacy enhanced mail —
- psychoneuroimmunology — the study of the effects of psychological factors on the immune system
- pulse height analyser — a multichannel analyser that sorts pulses into selected amplitude ranges
- pulse height analyzer — an instrument that records or counts an electrical pulse if its amplitude falls within specified limits: used in nuclear physics research for the determination of energy spectra of nuclear radiations
- rayleigh distribution — (mathematics) A curve that yields a good approximation to the actual labour curves on software projects.
- rectangular hyperbola — a hyperbola with perpendicular asymptotes
- reverse polish syntax — postfix notation
- salam-weinberg theory — the electroweak theory.
- schlieren photography — a type of photography which records schlieren
- sunday school teacher — someone who teaches at a Sunday school
- tartarian honeysuckle — an Asian honeysuckle, Lonicera tatarica, having fragrant, white to pink flowers.
- the early renaissance — the period from about 1400 to 1500 in European, esp Italian, painting, sculpture, and architecture, when naturalistic styles and humanist theories were evolved from the study of classical sources, notably by Donatello, Masaccio, and Alberti
- the women's land army — a unit of women recruited to do agricultural work in the United Kingdom during World War I and World War II
- to fly in the face of — If an action or belief flies in the face of accepted ideas or rules, it seems to completely oppose or contradict them.
- to fly off the handle — If you fly off the handle, you suddenly and completely lose your temper.
- to lay something bare — If you lay something bare, you uncover it completely so that it can then be seen.
- to let your hair down — If you let your hair down, you relax completely and enjoy yourself.
- vertically challenged — short in stature.
- weinberg-salam theory — electroweak theory.