level


level
1. Any rank, position, or status in a graded scale of values. 2. A test for determining such rank or position.
- acoustic reference l. the biological reference l. for sound measurements. When the term decibel is used to indicate the noise l., a reference quantity is implied; this reference value is usually expressed as a sound pressure of 20 micronewtons per square meter. The reference l. is referred to as 0 decibels, the baseline of the scale of noise levels; this baseline is considered the weakest sound that can be heard by a person with very good hearing in an extremely quiet location. Other equivalent reference levels still being used include 0.0002 microbar and 0.0002 dyne per square centimeter. SEE ALSO: sound pressure l..
- l. of aspiration in clinical psychology, the degree or quality of performance (exhibited in a testing situation) which a person desires to attain or feels he or she can achieve.
- background l. the concentration (usually low) at which a substance or agent is present or occurs at a particular time and place in the absence of a specific hazard under investigation; an example is the background l. of ionizing radiation.
- Clark l. the l. of invasion of primary malignant melanoma of the skin; limited to the epidermis, I; into the underlying papillary dermis, II; to the junction of the papillary and reticular dermis, III; into the reticular dermis, IV; into the subcutaneous fat, V. The prognosis is worse with each successive deeper l. of invasion.
- hearing l. the measure of the status of hearing as read directly on the hearing loss scale of an audiometer; described in decibels as a deviation from a standard value for zero on the audiometer.
- loudness discomfort l. the intensity at which sound, particularly speech, causes discomfort.
- most comfortable l. the greatest sound intensity that is comfortable.
- sensation l. the amount in decibels that a stimulus is above the hearing threshold.
- sensory acuity l. a technique for determining air conduction thresholds without masking and with masking presented by bone conduction to the forehead; the change in thresholds indicates the conductive hearing loss.
- sound pressure l. (SPL) a measure of sound energy relative to 0.0002 dynes/cm2, expressed in decibels.
- uncomfortable l. the intensity of sound that causes discomfort.
- window l. the CT number setting in Hounsfield units of the midpoint of the window width, which is the gray scale of the image; a typical window l. for imaging the lungs is −500; for the abdomen, 0.

* * *

lev·el 'lev-əl n
1) a characteristic and fairly uniform concentration of a constituent of the blood or other body fluid <a normal blood-sugar \level>
2 a) a degree of ability or aptitude or measure of performance
b) a grade of mental and emotional development or maturity <evidence as to \levels of personality development (e.g., anal, oral) (G. P. Murdock)>

* * *

lev·el (levґəl) relative position, rank, or concentration.

Medical dictionary. 2011.

Synonyms:

Look at other dictionaries:

  • Level — Lev el (l[e^]v [e^]l), n. [OE. level, livel, OF. livel, F. niveau, fr. L. libella level, water level, a plumb level, dim. of libra pound, measure for liquids, balance, water poise, level. Cf. {Librate}, {Libella}.] 1. A line or surface to which,… …   The Collaborative International Dictionary of English

  • Level — or levels may refer to: Contents 1 Places 2 Engineering related 3 Science and mathematics …   Wikipedia

  • Level 42 — Datos generales Origen …   Wikipedia Español

  • LeveL — is a computer and video games magazine originating in the Czech Republic with branches in Romania and Turkey. These three brother divisions occasionally exchange content. In addition to publishing the magazine, LeveL also organizes many yearly… …   Wikipedia

  • level — [lev′əl] n. [OFr livel < VL * libellus < L libella, dim. of libra, a balance, level, weight] 1. an instrument for determining, or adjusting a surface to, an even horizontal plane: it has a glass tube partly filled with liquid so as to leave …   English World dictionary

  • Level E — レベルE (Рэбэру E) …   Википедия

  • Level — Lev el (l[e^]v [e^]l), a. 1. Even; flat; having no part higher than another; having, or conforming to, the curvature which belongs to the undisturbed liquid parts of the earth s surface; as, a level field; level ground; the level surface of a… …   The Collaborative International Dictionary of English

  • Level C — 快楽の方程式 Level C (Keiraku no Houteishiki Level C) Жанр яой Манга Автор Футаба Аой, Мицуба Курэнай Издатель …   Википедия

  • level# — level vb point, train, *direct, aim, lay level adj Level, flat, plane, plain, even, smooth, flush are comparable chiefly as applied to surfaces and as meaning having a surface comparable to that of a perfectly calm body of water with no part… …   New Dictionary of Synonyms

  • Level-5 — Тип Частная компания Год основания Октябрь 1998 Расположение …   Википедия

  • Level — Lev el, v. t. [imp. & p. p. {Leveled} ( [e^]ld) or {Levelled}; p. pr. & vb. n. {Leveling} or {Levelling}.] 1. To make level; to make horizontal; to bring to the condition of a level line or surface; hence, to make flat or even; as, to level a… …   The Collaborative International Dictionary of English

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.