| anastigmat | (noun) compound lens or lens system designed to be free of astigmatism and able to form approximately point images | - |
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| antigen | (noun) any substance (as a toxin or enzyme) that stimulates an immune response in the body (especially the production of antibodies) | - |
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| antigram | (noun) an anagram that means the opposite of the original word or phrase | - |
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| astigmatism | (noun) (optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point | Synonyms: astigmia |
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| (noun) (ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea; common in nearsighted people | Synonyms: astigmia |
| astigmia | (noun) (optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point | Synonyms: astigmatism |
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| (noun) (ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea; common in nearsighted people | Synonyms: astigmatism |
| castigation | (noun) verbal punishment | Synonyms: chastisement |
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| (noun) a severe scolding | Synonyms: bawling out, chewing out, dressing down, earful, going-over, upbraiding |
| contiguity | (noun) the attribute of being so near as to be touching | Synonyms: adjacency, contiguousness |
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| contiguousness | (noun) the attribute of being so near as to be touching | Synonyms: adjacency, contiguity |
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| digitigrade | (noun) an animal that walks so that only the toes touch the ground as e.g. dogs and cats and horses | Synonyms: digitigrade mammal |
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| fatigability | (noun) susceptibility to fatigue; a tendency to get tired or lose strength | - |
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| fatigue | (noun) labor of a nonmilitary kind done by soldiers (cleaning or digging or draining or so on) | Synonyms: fatigue duty |
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| (noun) (always used with a modifier) boredom resulting from overexposure to something | - |
| (noun) temporary loss of strength and energy resulting from hard physical or mental work | Synonyms: tiredness, weariness |
| (noun) used of materials (especially metals) in a weakened state caused by long stress | - |
| fatigues | (noun) military uniform worn by military personnel when doing menial labor | - |
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| flibbertigibbet | (noun) a female fool | Synonyms: foolish woman |
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| hypermastigote | (noun) flagellate symbiotic in the intestines of e.g. termites | - |
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| impetigo | (noun) a very contagious infection of the skin; common in children; localized redness develops into small blisters that gradually crust and erode | - |
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| indefatigability | (noun) tireless determination | Synonyms: indefatigableness, tirelessness |
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| indefatigableness | (noun) tireless determination | Synonyms: indefatigability, tirelessness |
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| instigant | (noun) someone who deliberately foments trouble | Synonyms: firebrand, inciter, instigator, provoker |
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| instigation | (noun) deliberate and intentional triggering (of trouble or discord) | Synonyms: fomentation |
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| (noun) the verbal act of urging on | Synonyms: abetment, abettal |
| instigator | (noun) a person who initiates a course of action | Synonyms: initiator |
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| (noun) someone who deliberately foments trouble | Synonyms: firebrand, inciter, instigant, provoker |
| investigating | (noun) the work of inquiring into something thoroughly and systematically | Synonyms: investigation |
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| investigation | (noun) the work of inquiring into something thoroughly and systematically | Synonyms: investigating |
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| (noun) an inquiry into unfamiliar or questionable activities | Synonyms: probe |
| investigator | (noun) someone who investigates | - |
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| (noun) a scientist who devotes himself to doing research | Synonyms: research worker, researcher |
| (noun) a police officer who investigates crimes | Synonyms: detective, police detective, tec |
| lentigo | (noun) a small brownish spot (of the pigment melanin) on the skin | Synonyms: freckle |
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| litigant | (noun) (law) a party to a lawsuit; someone involved in litigation | Synonyms: litigator |
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| litigation | (noun) a legal proceeding in a court; a judicial contest to determine and enforce legal rights | Synonyms: judicial proceeding |
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| litigator | (noun) (law) a party to a lawsuit; someone involved in litigation | Synonyms: litigant |
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| litigiousness | (noun) a quarrelsome disposition to engage in or carry on lawsuits | - |
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| mantiger | (noun) a mythical monster having the head of man (with horns) and the body of a lion and the tail of a scorpion | Synonyms: mantichora, manticora, manticore |
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| mastigophoran | (noun) a usually nonphotosynthetic free-living protozoan with whiplike appendages; some are pathogens of humans and other animals | Synonyms: flagellate, flagellate protozoan, flagellated protozoan, mastigophore |
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| mastigophore | (noun) a usually nonphotosynthetic free-living protozoan with whiplike appendages; some are pathogens of humans and other animals | Synonyms: flagellate, flagellate protozoan, flagellated protozoan, mastigophoran |
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| mitigation | (noun) to act in such a way as to cause an offense to seem less serious | Synonyms: extenuation, palliation |
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| (noun) the action of lessening in severity or intensity | Synonyms: moderation |
| (noun) a partial excuse to mitigate censure; an attempt to represent an offense as less serious than it appears by showing mitigating circumstances | Synonyms: extenuation |
| neostigmine | (noun) a cholinergic drug (trade name Prostigmin) used to treat some ophthalmic conditions and to treat myasthenia gravis | Synonyms: Prostigmin |
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| physostigmine | (noun) used in treatment of Alzheimer's disease and glaucoma | - |
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| plantigrade | (noun) an animal that walks with the entire sole of the foot touching the ground as e.g. bears and human beings | Synonyms: plantigrade mammal |
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| polymastigote | (noun) flagellates with several flagella | - |
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| prestige | (noun) a high standing achieved through success or influence or wealth etc. | Synonyms: prestigiousness |
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| prestigiousness | (noun) a high standing achieved through success or influence or wealth etc. | Synonyms: prestige |
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| scintigram | (noun) a recording of the radioactivity emitted by a tracer in an organism or organ system. | - |
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| scintigraph | (noun) The apparatus used to make a scintigram. | Synonyms: scintiscanner |
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| steamtightness | (noun) The property of being being sealed in such a way that steam cannot leak out. | - |
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| sticktight | (noun) parasitic on especially the heads of chickens | Synonyms: Echidnophaga gallinacea, sticktight flea |
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| (noun) any of several plants of the genus Bidens having yellow flowers and prickly fruits that cling to fur and clothing | Synonyms: beggar's-ticks, beggar-ticks, bur marigold, burr marigold |
| stigma | (noun) a skin lesion that is a diagnostic sign of some disease | - |
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| (noun) an external tracheal aperture in a terrestrial arthropod | - |
| (noun) a symbol of disgrace or infamy | Synonyms: brand, mark, stain |
| (noun) the apical end of the style where deposited pollen enters the pistil | - |
| stigmata | (noun) marks resembling the wounds on the crucified body of Christ | - |
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| stigmatic | (noun) a person whose body is marked by religious stigmata (such as marks resembling the wounds of the crucified Christ) | Synonyms: stigmatist |
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| stigmatisation | (noun) the act of stigmatizing | Synonyms: branding, stigmatization |
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| stigmatism | (noun) normal eyesight | - |
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| (noun) (optics) condition of an optical system (as a lens) in which light rays from a single point converge in a single focal point | - |
| (noun) the condition of having or being marked by stigmata | - |
| stigmatist | (noun) a person whose body is marked by religious stigmata (such as marks resembling the wounds of the crucified Christ) | Synonyms: stigmatic |
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| stigmatization | (noun) the act of stigmatizing | Synonyms: branding, stigmatisation |
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| stratigraphy | (noun) the branch of geology that studies the arrangement and succession of strata | - |
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| tertigravida | (noun) a woman who is pregnant for the third time | Synonyms: gravida III |
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| tettigoniid | (noun) grasshoppers with long threadlike antennae and well-developed stridulating organs on the forewings of the male | Synonyms: long-horned grasshopper |
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| tiger | (noun) large feline of forests in most of Asia having a tawny coat with black stripes; endangered | Synonyms: Panthera tigris |
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| (noun) a fierce or audacious person | - |
| tightening | (noun) the act of making something tighter | - |
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| tightfistedness | (noun) extreme stinginess | Synonyms: closeness, meanness, minginess, niggardliness, niggardness, parsimoniousness, parsimony, tightness |
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| tightness | (noun) lack of movement or room for movement | Synonyms: tautness |
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| (noun) extreme stinginess | Synonyms: closeness, meanness, minginess, niggardliness, niggardness, parsimoniousness, parsimony, tightfistedness |
| (noun) the spatial property of being crowded together | Synonyms: compactness, concentration, denseness, density |
| (noun) a tight feeling in some part of the body | Synonyms: constriction |
| (noun) a state occasioned by scarcity of money and a shortage of credit | Synonyms: stringency |
| tightrope | (noun) tightly stretched rope or wire on which acrobats perform high above the ground | - |
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| tights | (noun) skintight knit hose covering the body from the waist to the feet worn by acrobats and dancers and as stockings by women and girls | Synonyms: leotards |
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| tightwad | (noun) a miserly person | Synonyms: cheapskate |
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| tiglon | (noun) offspring of a male tiger and a female lion | Synonyms: tigon |
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| tigon | (noun) offspring of a male tiger and a female lion | Synonyms: tiglon |
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| tigress | (noun) a female tiger | - |
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| vertigo | (noun) a reeling sensation; a feeling that you are about to fall | Synonyms: dizziness, giddiness, lightheadedness |
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| vestige | (noun) an indication that something has been present | Synonyms: shadow, tincture, trace |
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| watertightness | (noun) The condition of being so tightly made that water cannot enter or escape. | Synonyms: waterproofness |
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| zoomastigote | (noun) flagellate protozoan lacking photosynthesis and other plant-like characteristics | Synonyms: zooflagellate |
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