14-letter words containing o, p, s, a
- locker-lampson — Frederick (Frederick Locker) 1821–95, English poet.
- lopping shears — long-handled pruning shears.
- lord spiritual — a bishop or archbishop belonging to the House of Lords.
- lords temporal — a member of the House of Lords who is not a member of the clergy.
- louis napoleon — (Louis Napoleon; Charles Louis Napoleon Bonaparte) [loo-ee;; French lwee] /ˈlu i;; French lwi/ (Show IPA), 1808–73, president of France 1848–52, emperor of France 1852–70 (nephew of Napoleon I).
- lugger topsail — a fore-and-aft topsail used above a lugsail.
- luminous paint — paint containing a phosphor that emits visible light when irradiated with ultraviolet light.
- lymphedematous — Relating to lymphedema.
- lyophilisation — Alternative spelling of lyophilization.
- machine pistol — a fully automatic pistol; submachine gun.
- macrocephalous — Having a large head.
- macrosporangia — Plural form of macrosporangium.
- magnetospheres — Plural form of magnetosphere.
- magnetospheric — Of, pertaining to, or happening within the magnetosphere.
- major prophets — theology
- malacophyllous — (of plants living in dry regions) having fleshy leaves in which water is stored
- male menopause — a malaise that allegedly affects men in middle age and is said to be responsible for periods of emotional upset and uncharacteristic behavior.
- malpighiaceous — of, relating to, or belonging to the Malpighiaceae, a family of tropical plants many of which are lianas
- mangrove swamp — a coastal marine swamp of tropical or subtropical regions that is dominated by mangrove trees.
- markov process — a process in which future values of a random variable are statistically determined by present events and dependent only on the event immediately preceding.
- marsupial bone — epipubis.
- marsupial mole — a burrowing Australian marsupial of the genus Notoryctes, resembling a common mole in form and behavior.
- massage parlor — a commercial establishment providing massages.
- mastigophorous — carrying a cane or whip
- meadow parsnip — any North American plant belonging to the genus Thaspium, of the parsley family, having yellow or purple flowers.
- megascopically — macroscopically
- megasporangium — a sporangium containing megaspores.
- megasporophyll — a sporophyll producing megasporangia only.
- melanospermous — having dark spores, as certain seaweeds.
- membranophones — Plural form of membranophone.
- mesencephalons — Plural form of mesencephalon.
- metamorphosing — to change the form or nature of; transform.
- metamorphosise — (UK, nonstandard) To metamorphose.
- metamorphosize — (US, nonstandard) To undergo the process of metamorphosis; to metamorphose.
- metaphosphates — Plural form of metaphosphate.
- metaphosphoric — applied to an acid (HPO3) containing a molecule less of water than orthophosphoric acid
- metapsychology — speculative thought dealing systematically with concepts extending beyond the limits of psychology as an empirical science.
- metencephalons — Plural form of metencephalon.
- metoposcopical — relating to metoposcopy
- microcephalous — Microcephalic.
- microparasites — Plural form of microparasite.
- microparasitic — Of or pertaining to microparasites.
- micropulsation — a very minor fluctuation in the strength of the earth's magnetic field
- microspherical — relating to or designating a microsphere
- microsporangia — Plural form of microsporangium.
- microsporidian — Any of many parasites, of the class Microsporidia, that are very small fungi.
- misacceptation — misinterpretation
- misanthropical — of, relating to, or characteristic of a misanthrope.
- misanthropists — Plural form of misanthropist.
- misapplication — to make a wrong application or use of.