adj
(physics, chemistry) Having an activation energy near 0
adj
Not transparent; not translucent; not diaphanous; opaque.
adj
Having no fever, without a fever.
adj
(of food, drink, etc.) Consisting wholly of natural ingredients
adj
(chemistry) Having no water of crystallization.
adj
Free of disease-causing microbes.
n
A patient who exhibits no symptoms of disease.
n
Inability to transmit radiant heat; impermeability to heat.
adj
Having an overall zero carbon footprint after carbon emissions trading has been taken into account.
adj
Not producing any carbon compounds such as carbon dioxide that might contribute to pollution, including to the atmosphere.
adj
That does not damage the environment.
adj
(physics, of an interaction, or of the transfer of energy) That does not involve a collision between particles, bodies, plasmas or waves.
adj
Of cosmetics and similar products: made without harming animals.
adj
free of disease, not having, carrying, or suffering from any disease.
adj
Free of disease; uninfected.
adj
Having enough light to see, but not enough to carry out photosynthesis.
adj
(pharmacology, medicine) Lacking tolerance to or dependence on the pharmacological effect of a drug.
adj
Without (recreational) drugs.
adj
That is associated with no (harmful) emissions
adj
Alternative form of fat-free [Not containing fat.]
n
Characteristics not involving atomic components.
adj
(of water) Without salt; not saline.
adj
Without any (especially harmful) microorganisms; aseptic.
adj
Alternative spelling of gluten-free [(of food) Containing no gluten.]
adj
(physics) That does not involve gravitinos
adj
(computing, slang, of a macro) Whose expansion is guaranteed not to cause the accidental capture of identifiers.
adj
Not perforated; having no opening or aperture; imperforate.
adj
(physics) Showing no optical activity in polarized light.
adj
Having no therapeutic action.
n
(chemistry) A gas which does not undergo chemical reactions.
adj
Incapable of being smelled, odorless.
adj
(informal) Not having had an injection, especially of a COVID-19 vaccine.
adj
Producing fewer pollutants to be emitted into the atmosphere.
adj
(of an illness or pain) Not serious or dangerous.
adj
Containing no artificial or man-made additives; especially (of food) containing no colourings, flavourings or preservatives.
n
A food that has been not been processed in any way that alters covalent bonds, and to which no artificial substance has been added.
n
(pathology) Abbreviation of non-24-hour sleep-wake rhythm disorder.
adj
(of a food) That provides no (or few) calories.
n
Something that is not a challenge.
adj
(virology) Without a viral envelope.
n
(medicine) A person who does not show an immune response to a virus after being vaccinated against it
adj
Not transparent; lacking transparence; opaque.
adj
Not winged; without wings.
n
A person who has never had COVID-19, or believes so because they were asymptomatic when infected.
adj
(of a woman or female animal) That has never given birth.
adj
Any system that does not use feedback
adj
(of lamps, fires etc.) Not shining or burning.
adj
(healthcare) Provided without requiring an overnight stay by the patient.
adj
Obtained without a medical prescription.
adj
(medicine) Displaced beyond the limits of a body cavity.
adj
(physics) That involves no radiation of energy
adj
Not affected by great heat.
adj
alternative form of saltfree [Free of salt]
adj
That does not involve watching a (television or computer) screen.
adj
Of a surface, having low friction, often due to being covered in a non-viscous liquid, and therefore hard to grip, hard to stand on without falling, etc.
adj
Germless; free from all living or viable microorganisms.
adj
Less than normally lustrous
adj
(British spelling) Not containing any sulphur.
adj
Not having a territory.
adj
(biochemistry) Lacking thymidine.
adj
Characterized by an absence of trauma.
n
Someone not affected, as by a disease.
adj
Not nourishing to eat.
adj
Remaining in its initial state; not changed.
adj
Not bright; lacking light; dim.
adj
(physics, chemistry) Not carrying an overall electric charge; neutral.
adj
(American spelling) Having no color; not treated with a dye or other color.
adj
(physics, of a linear dynamic system) Possessing a damping ratio of exactly zero.
adj
That provides insufficient illumination
adj
Insufficiently luminous
n
Lack of digestion, or poor digestion.
adj
Not flavored; having no flavor.
adj
Not fruiting; not producing fruit.
adj
Not having been immunized.
adj
(informal) Unvaccinated.
adj
(rare) Not light (“having little weight”).
adj
Incapable of catching fire or being ignited.
adj
Not ornamented; without ornament.
adj
That does not reflect light or sound.
n
(nonstandard, very rare) Synonym of nonwhite
adj
Not tied to the products of a specific manufacturer.
adj
alternative form of waterfree [Free of water.]
adj
(botany) Non-herbaceous.
n
Having zero cases of COVID-19.
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