13-letter words containing a, t, o, p
- photochemical — the branch of chemistry that deals with the chemical action of light.
- photocopiable — able or legally permitted to be photocopied
- photodynamics — the science dealing with light and its effects on living organisms.
- photogelatine — relating to photographic processes in which gelatine is used in receiving or transferring prints
- photographing — a picture produced by photography.
- photonegative — pertaining to a substance, as selenium, having a conductivity that decreases upon absorption of electromagnetic radiation.
- photoreaction — a chemical reaction that involves or requires light.
- photosynthate — a compound formed by photosynthesis.
- phototelegram — a telegram that is sent by means of phototelegraphy
- photovoltaics — (used with a singular verb) a field of semiconductor technology involving the direct conversion of electromagnetic radiation as sunlight, into electricity.
- phraseologist — a person who treats of or is concerned with phraseology.
- phreatophytic — of, possessing the properties of, or relating to a phreatophyte
- physiotherapy — physical therapy.
- phytochemical — Also called phytonutrient. any of various bioactive chemical compounds found in plants, as antioxidants, considered to be beneficial to human health.
- phytopathogen — an organism that causes disease in plants
- phytoplankter — a minute organism which constitutes part of phytoplankton
- phytoplankton — the aggregate of plants and plantlike organisms in plankton.
- phytosanitary — of or relating to the health of plants
- piano quartet — a musical composition scored for piano and three other instruments, typically violin, viola, and cello.
- piano quintet — a musical composition scored for a string quartet, or other combination of four instruments, and piano.
- piano teacher — tutor of piano-playing
- pico de aneto — Pi·co de [pee-kaw th e] /ˈpi kɔ ðɛ/ (Show IPA). Spanish name of Pic de Néthou.
- pictorialness — the state of being pictorial
- picturization — to represent in a picture, especially in a motion picture; make a picture of.
- pidginization — to develop (a language) into a pidgin.
- piece of meat — the flesh of animals as used for food.
- piezomagnetic — involving or relating to the production of a magnetic field by applying a mechanical stress to certain crystals
- pigeon breast — chicken breast.
- pigouvian tax — a tax levied to counter an economic negative externality, for example taxing producers of industrial pollution in order to encourage pollution control
- pilot balloon — a balloon for the visual observation of upper-atmosphere wind currents.
- pilot station — Also called pilotage. an onshore office or headquarters for pilots.
- pivot grammar — a loose grammar said to govern two-word utterances by children
- plagiostomous — plagiostome
- plagiotropism — plagiotropic tendency or growth.
- plain yoghurt — natural yoghurt, without added flavouring
- plain-clothes — Plain-clothes police officers wear ordinary clothes instead of a police uniform.
- plane spotter — a person who observes, photographs, and catalogues aircraft as a hobby
- planetologist — the branch of astronomy that deals with the physical features of the planets.
- plant hormone — an organic chemical, as auxin, produced by plant cells and functioning at various sites to regulate growth, turning, metabolic processes, etc.
- plant kingdom — the plants of the world collectively.
- plasmodesmata — any of many minute strands of cytoplasm that extend through plant cell walls and connect adjoining cells.
- plastic money — credit cards, used instead of cash
- plastoquinone — a quinone that occurs in the chloroplasts of plants and functions as an electron carrier during photosynthesis.
- platform game — a type of computer game that is played by moving a figure on the screen through a series of obstacles and problems
- platform shoe — a shoe with a platform.
- platiniferous — platinum-bearing
- platinocyanic — of or derived from platinocyanic acid.
- platitudinous — characterized by or given to platitudes.
- platonic love — Platonism. love of the Idea of beauty, seen as terminating an evolution from the desire for an individual and the love of physical beauty to the love and contemplation of spiritual or ideal beauty.
- platonic year — a period of about 26,000 years, equal to the time required for a complete revolution of the equinoxes.