| aqueduct | (noun) a conduit that resembles a bridge but carries water over a valley | - |
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| coeducation | (noun) education of men and women in the same institutions | - |
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| credulity | (noun) tendency to believe readily | - |
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| credulousness | (noun) tendency to believe too readily and therefore to be easily deceived | Synonyms: gullibility |
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| deductible | (noun) a clause in an insurance policy that relieves the insurer of responsibility to pay the initial loss up to a stated amount | - |
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| (noun) (taxes) an amount that can be deducted (especially for the purposes of calculating income tax) | - |
| deduction | (noun) the act of subtracting (removing a part from the whole) | Synonyms: subtraction |
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| (noun) the act of reducing the selling price of merchandise | Synonyms: discount, price reduction |
| (noun) reasoning from the general to the particular (or from cause to effect) | Synonyms: deductive reasoning, synthesis |
| (noun) something that is inferred (deduced or entailed or implied) | Synonyms: entailment, implication |
| (noun) an amount or percentage deducted | Synonyms: discount |
| (noun) a reduction in the gross amount on which a tax is calculated; reduces taxes by the percentage fixed for the taxpayer's income bracket | Synonyms: tax deduction, tax write-off |
| educatee | (noun) a learner who is enrolled in an educational institution | Synonyms: pupil, student |
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| education | (noun) the activities of educating or instructing; activities that impart knowledge or skill | Synonyms: didactics, educational activity, instruction, pedagogy, teaching |
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| (noun) the profession of teaching (especially at a school or college or university) | - |
| (noun) the result of good upbringing (especially knowledge of correct social behavior) | Synonyms: breeding, training |
| (noun) knowledge acquired by learning and instruction | - |
| (noun) the gradual process of acquiring knowledge | - |
| educationalist | (noun) a specialist in the theory of education | Synonyms: educationist |
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| educationist | (noun) a specialist in the theory of education | Synonyms: educationalist |
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| educator | (noun) someone who educates young people | Synonyms: pedagog, pedagogue |
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| edutainment | (noun) entertainment that is intended to be educational | - |
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| incredulity | (noun) doubt about the truth of something | Synonyms: disbelief, mental rejection, scepticism, skepticism |
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| medulla | (noun) the inner part of an organ or structure in plant or animal | - |
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| (noun) lower or hindmost part of the brain; continuous with spinal cord; (`bulb' is an old term for medulla oblongata) | Synonyms: bulb, medulla oblongata |
| (noun) a white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers | Synonyms: myelin, myeline |
| medusa | (noun) one of two forms that coelenterates take: it is the free-swimming sexual phase in the life cycle of a coelenterate; in this phase it has a gelatinous umbrella-shaped body and tentacles | Synonyms: medusan, medusoid |
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| medusan | (noun) one of two forms that coelenterates take: it is the free-swimming sexual phase in the life cycle of a coelenterate; in this phase it has a gelatinous umbrella-shaped body and tentacles | Synonyms: medusa, medusoid |
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| medusoid | (noun) one of two forms that coelenterates take: it is the free-swimming sexual phase in the life cycle of a coelenterate; in this phase it has a gelatinous umbrella-shaped body and tentacles | Synonyms: medusa, medusan |
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| overcredulity | (noun) too much credulity | - |
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| oxidoreductase | (noun) an enzyme that catalyzes oxidation-reduction | - |
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| oxidoreduction | (noun) a reversible chemical reaction in which one reaction is an oxidation and the reverse is a reduction | Synonyms: oxidation-reduction, redox |
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| peduncle | (noun) a bundle of myelinated neurons joining different parts of the brain | Synonyms: cerebral peduncle |
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| (noun) stalk bearing an inflorescence or solitary flower | - |
| (noun) the thin process of tissue that attaches a polyp to the body | - |
| procedure | (noun) a particular course of action intended to achieve a result | Synonyms: process |
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| (noun) a mode of conducting legal and parliamentary proceedings | - |
| (noun) a process or series of acts especially of a practical or mechanical nature involved in a particular form of work | Synonyms: operation |
| (noun) a set sequence of steps, part of larger computer program | Synonyms: function, routine, subprogram, subroutine |
| reducer | (noun) pipefitting that joins two pipes of different diameter | - |
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| (noun) a substance capable of bringing about the reduction of another substance as it itself is oxidized; used in photography to lessen the density of a negative or print by oxidizing some of the loose silver | Synonyms: reducing agent, reductant |
| reducing | (noun) any process in which electrons are added to an atom or ion (as by removing oxygen or adding hydrogen); always occurs accompanied by oxidation of the reducing agent | Synonyms: reduction |
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| (noun) loss of excess weight (as by dieting); becoming slimmer | - |
| reductant | (noun) a substance capable of bringing about the reduction of another substance as it itself is oxidized; used in photography to lessen the density of a negative or print by oxidizing some of the loose silver | Synonyms: reducer, reducing agent |
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| reductase | (noun) an enzyme that catalyses the biochemical reduction of some specified substance | - |
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| reductio | (noun) (reduction to the absurd) a disproof by showing that the consequences of the proposition are absurd; or a proof of a proposition by showing that its negation leads to a contradiction | Synonyms: reductio ad absurdum |
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| reduction | (noun) the act of decreasing or reducing something | Synonyms: decrease, diminution, step-down |
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| (noun) the act of reducing complexity | Synonyms: simplification |
| (noun) any process in which electrons are added to an atom or ion (as by removing oxygen or adding hydrogen); always occurs accompanied by oxidation of the reducing agent | Synonyms: reducing |
| reductionism | (noun) a theory that all complex systems can be completely understood in terms of their components | - |
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| (noun) the analysis of complex things into simpler constituents | - |
| reductivism | (noun) an art movement in sculpture and painting that began in the 1950s and emphasized extreme simplification of form and color | Synonyms: minimal art, minimalism |
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| redundance | (noun) the attribute of being superfluous and unneeded | Synonyms: redundancy |
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| redundancy | (noun) repetition of an act needlessly | - |
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| (noun) the attribute of being superfluous and unneeded | Synonyms: redundance |
| (noun) (electronics) a system design that duplicates components to provide alternatives in case one component fails | - |
| (noun) repetition of messages to reduce the probability of errors in transmission | - |
| reduplication | (noun) the act of repeating over and again (or an instance thereof) | Synonyms: reiteration |
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| (noun) a word formed by or containing a repeated syllable or speech sound (usually at the beginning of the word) | - |
| (noun) the syllable added in a reduplicated word form | - |
| (noun) repetition of the final words of a sentence or line at the beginning of the next | Synonyms: anadiplosis |
| reduviid | (noun) a true bug: long-legged predacious bug living mostly on other insects; a few suck blood of mammals | Synonyms: assassin bug |
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| schedule | (noun) a temporally organized plan for matters to be attended to | Synonyms: agenda, docket |
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| (noun) an ordered list of times at which things are planned to occur | - |
| scheduler | (noun) computer hardware that arranges jobs to be done by the computer in an appropriate order | - |
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| scheduling | (noun) setting an order and time for planned events | Synonyms: programing, programming |
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| seducer | (noun) a man who takes advantage of women | Synonyms: ladies' man, lady killer |
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| (noun) a bad person who entices others into error or wrongdoing | - |
| seduction | (noun) enticing someone astray from right behavior | - |
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| (noun) an act of winning the love or sexual favor of someone | Synonyms: conquest |
| seductress | (noun) a woman who seduces | - |
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| sedulity | (noun) the quality of being constantly diligent and attentive | Synonyms: sedulousness |
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| sedulousness | (noun) the quality of being constantly diligent and attentive | Synonyms: sedulity |
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| sedum | (noun) any of various plants of the genus Sedum | - |
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| speedup | (noun) the act of accelerating; increasing the speed | Synonyms: acceleration, quickening |
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| supersedure | (noun) act of replacing one person or thing by another especially one held to be superior | Synonyms: supersession |
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