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单词 lumen
释义
lumen
noun[C]
specialized
uk
/ˈluː.mən/us
/ˈluː.mən/

lumennoun[C](UNIT OF LIGHT)

physics
(abbreviationlm)
aunitformeasuringtheamountoflightsomethingproduces:
（光的单位）流明
alightbulbratedat 750 lumens一只750流明的电灯泡
SMART Vocabulary: related words and phrases
Miscellaneous units of measurement
  • acre
  • acreage
  • caloric
  • curie
  • dioptre
  • farad
  • fathom
  • firkin
  • flashpoint
  • hectare
  • Hz
  • MHz
  • millibar
  • molar
  • newton
  • refractive index
  • Scoville scale
  • sievert
  • torr
  • watt
See more results »

You can also find related words, phrases, and synonyms in the topics:

Electricity - units

lumennoun[C](IN BODY)

medicalpluralluminaorlumens
the insidespaceof a tube-shapedorganin thebody, forexampleabloodvesselorintestine:
（身体内的）腔
intestinal/vascularlumen肠道／血管管腔
SMART Vocabulary: related words and phrases
Substances & structures in the body
  • abductor
  • accessorius
  • adductor
  • adenoid
  • agonist
  • gracilis
  • grey matter
  • groove
  • gyrus
  • hallucis
  • papilla
  • papillary
  • parietal
  • pecten
  • pectineal
  • vesical
  • vesicle
  • vestibular
  • vestibule
  • visceral muscle
See more results »
(Definition oflumenfrom theCambridge Advanced Learner's Dictionary & Thesaurus© Cambridge University Press)

lumen| American Dictionary

lumen
noun[C]
us/ˈlu·mən/
physics,earth science
thestandardunitformeasuringthebrightnessof alight,equalto theamountoflighthittingonesquarefootofsurfaceonefootaway from thelight
(Definition oflumenfrom theCambridge Academic Content Dictionary© Cambridge University Press)

Examplesoflumen

lumen
Washings from thelumenof the gut were passed through a sieve (154 mm mesh size) to recover even the smallest parasites.
From theCambridge English Corpus
Indentations in the repaired region leave a somewhat tortuouslumen.
From theCambridge English Corpus
The apical plasma membrane of the rachis is elevated to form numerous microvilli-like projections into thelumen.
From theCambridge English Corpus
The apical plasma membrane extends into thelumenin microvilli-like projections.
From theCambridge English Corpus
The thicker posterior end extends into the caecallumento facilitate mating and oviposition.
From theCambridge English Corpus
The gradient in muscle tension created along the intestine (increased in jejunum and decreased in ileum) may promote propulsion of worms in thelumen.
From theCambridge English Corpus
Exposures to high densities of cercariae could lead to encystment in other sites such as the kidneylumenor pericardial cavity.
From theCambridge English Corpus
Although thelumenis not significantly narrowed, localized peaks of velocity, up to 2 m/sec were found close to the two indented regions.
From theCambridge English Corpus
The uterine apical plasma membrane has microvilli-like projections into thelumenand the terminal bar lies between the apical ends of adjacent cells.
From theCambridge English Corpus
In early embryos the two main collecting tubes were composed of a layer of cells which were wrapped around thelumen.
From theCambridge English Corpus
Some of the stages present in thelumenappeared to be releasing the inner stages, and many showed evident signs of degeneration.
From theCambridge English Corpus
Metacercarial cysts localize in the pericardial cavity and the kidneylumenof the snail and these organs would have a finite capacity for carrying cysts.
From theCambridge English Corpus
The number oflumenworms (pre-adult and adult forms) was recorded.
From theCambridge English Corpus
Developmental stages also appeared in the intestinallumen, sometimes similar to the amoeboid stages observed by light microscopy.
From theCambridge English Corpus
The stylet had acquired a distinctlumenas had the oesophageal duct and the oesophageal glands appeared to be fully developed.
From theCambridge English Corpus
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
#https://dictionary.cambridge.org//dictionary/english/lumen##
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更新时间：2024/12/27 19:53:23