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lumen    音标拼音: [l'umən]
n. 流明,内腔

流明,内腔

lumen
流明

lumen
n 1: a unit of luminous flux equal to the amount of light given
out through a solid angle of 1 steradian by a point source
of 1 candela intensity radiating uniformly in all
directions [synonym: {lumen}, {lm}]
2: a cavity or passage in a tubular organ; "the lumen of the
intestine"

Lumen \Lu"men\, n.; pl. L. {Lumina}, E. {Lumens}. [L., light, an
opening for light.]
1. (Photom.)
(a) A unit of illumination, being the amount of
illumination of a unit area of spherical surface, due
to a light of unit intensity placed at the center of
the sphere.
(b) A unit of light flux, being the flux through one
square meter of surface the illumination of which is
uniform and of unit brightness.
[Webster 1913 Suppl.]

2. (Biol.) An opening, space, or cavity, esp. a tubular
cavity; a vacuole.
[Webster 1913 Suppl.]


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  • Business Enterprise Technology Solutions | Lumen
    Welcome to Lumen Explore our leading enterprise technology solutions for Networking, Security, Edge Cloud, Collaboration, SASE, DDoS and Managed Services
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    Lumen is the world’s first portable device to measure track and analyze your metabolism See if your body is using fats or carbs for fuel in a single breath
  • Careers at Lumen | Lumen jobs
    Apply online for jobs at Lumen Job opportunities in Lumen Corporate, Lumen Customer Service, Lumen Executive, Lumen High Tech, Lumen Program and Project Management, Lumen Sales Marketing, Lumen University and Entry Level, Lumen Technician and Network Operation jobs
  • AT T to Acquire Lumen’s Mass Markets Fiber Business
    Note: For more transaction details, management and investor relations comments are available HERE, along with AT T’s 8-K AT T (the Company) has reached an agreement to acquire substantially all of Lumen’s Mass Markets fiber business for $5 75 billion, subject to purchase price adjustments, in an all-cash transaction that will expand investment in critical U S connectivity infrastructure
  • Lumen Review: Does This Metabolism Tracker Work? - Forbes
    Learn about this popular metabolism tracker tool in our Lumen review, including how it works, how much it costs, whether it’s worth it and more
  • Lumen (unit) - Wikipedia
    The lumen (symbol: lm) is the SI unit of luminous flux, which quantifies the perceived power of visible light emitted by a source Luminous flux differs from power (radiant flux), which encompasses all electromagnetic waves emitted, including non-visible ones such as thermal radiation (infrared)
  • Lumen - Home
    After submitting your request, you will receive an activation email to the requested email address You must click the activation link in order to complete your subscription You can sign up for additional alert options at any time
  • AT T-Lumen Transaction | AT T
    AT T agrees to acquire substantially all of Lumen’s Mass Markets fiber internet connectivity business in a deal that’s expected to close in the first half of 2026 Transaction to stimulate investment, expand world-class connectivity in the U S , create new jobs and make high-speed fiber internet access available to millions of Americans
  • Sign in to your portal | Lumen
    Access your Lumen portal to manage services and accounts
  • Lumen Technologies - Wikipedia
    Lumen has gone through many acquisitions, divestments, and structural changes In the 20th century, this primarily consisted of buying and selling local telecom providers Larger mergers at the beginning of the 21st century added internet service providing to Lumen's core business





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