different between efficacy vs impression

English

Etymology

From Old French efficace, from Late Latin effic?cia (“efficacy”), from effic?x (“efficacious”); see efficacious.

Pronunciation

• IPA^(key): /??f.?.k?.si/

Noun

efficacy (usually uncountable, plural efficacies)

1. Ability to produce a desired effect under ideal testing conditions.
   • 2005, Flay et al. Standards of Evidence: Criteria for Efficacy, Effectiveness and Dissemination DOI: 10.1007/s11121-005-5553-y

     Efficacy refers to the beneficial effects of a program or policy under optimal conditions of delivery, whereas effectiveness refers to effects of a program or policy under more real-world conditions.

2. Degree of ability to produce a desired effect.
   • 1996, Moskovich, Patent application PCT/US1996/003658

     Toothbrush with improved efficacy

Synonyms

• efficacity

Related terms

Translations

Further reading

• efficacy in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.
• efficacy in The Century Dictionary, New York, N.Y.: The Century Co., 1911.

English

Etymology

From Old French impression, from Latin impressio.

Pronunciation

• IPA^(key): /?m?p????n/
• Rhymes: -???n

Noun

impression (plural impressions)

1. The indentation or depression made by the pressure of one object on or into another.

2. The overall effect of something, e.g., on a person.

3. A vague recalling of an event, a belief.

4. An impersonation, an imitation of the mannerisms of another individual.
5. An outward appearance.
6. (advertising) An online advertising performance metric representing an instance where an ad is shown once.
   • 2010, Dusty Reagan, Twitter Application Development For Dummies, John Wiley & Sons (?ISBN), page 329:

     Publishers are paid for each ad impression their site generates.

7. (painting) The first coat of colour, such as the priming in house-painting etc.
8. (engraving) A print on paper from a wood block, metal plate, etc.
9. (philosophy) The vivid perception of something as it is experienced, in contrast to ideas or thoughts drawn from memory or the imagination.

Related terms

• impressionability
• impressionable
• impressional
• impressionism
• impressionist
• impressive
• under the impression

Translations

Verb

impression (third-person singular simple present impressions, present participle impressioning, simple past and past participle impressioned)

1. To manipulate a blank key within a lock so as to mark it with impressions of the shape of the lock, which facilitates creation of a duplicate key.
   • 2007, Graham Pulford, High-Security Mechanical Locks: An Encyclopedic Reference (page 55)

     The trick in impressioning a key is to remove only a small amount of the blank, by filing or cutting, from the pin positions where impressions have been left.

Anagrams

• permission

French

Etymology

Borrowed from Latin impressi?.

Pronunciation

• IPA^(key): /??.p??.sj??/, /??.p?e.sj??/

Noun

impression f (plural impressions)

1. an impression, the overall effect of something.
2. the indentation or depression made by the pressure of one object on another.
3. a print, print-out

Derived terms

• faire bonne impression
• impressionnant
• impressionner
• impressionnisme
• impressionniste

Related terms

• empreindre
• imprimer
• imprimerie
• imprimante
• imprimable

Descendants

• Romanian: impresiune, impresie

Further reading

• “impression” in Trésor de la langue française informatisé (The Digitized Treasury of the French Language).

Anagrams

• méprisions