What does velamen mean?

Definitions for velamenvəˈleɪ mɪn; -ˈlæm ə nə

Here are all the possible meanings and translations of the word velamen.


  1. velamen(Noun)

    A covering membrane or velum


  1. Velamen

    Velamen is a spongy, multiple epidermis that covers the roots of some epiphytic or semi-epiphytic plants, such as orchid and Clivia species. The velamen of an orchid is the white or gray covering of aerial roots. It is many cell layers thick and capable of absorbing atmospheric moisture and nutrients. Often, the roots of orchids are associated with symbiotic fungi or bacteria, the latter may fix nutrients from the air. This functionality allows the orchid to exist in locations that provide a reproductive or vegetative advantage such as improved exposure or reduced competition from other plant species. The velamen also serves a mechanical function, protecting the vascular tissues in the root cortex, shielding the root from transpirational water loss, and, in many cases, adhering the plant to the substrate. The typical orchid root has a stele of comparatively small diameter.It is surrounded by a cortex which is further enveloped by a highly specialized exodermis most of which at maturity do not contain protoplasm.A few cells however are living and allow the passage of water through them.The exodermis is surrounded by velamen, consisting of one to several layers of cells, which can develop root hair under proper environmental conditions.


  1. Chaldean Numerology

    The numerical value of velamen in Chaldean Numerology is: 2

  2. Pythagorean Numerology

    The numerical value of velamen in Pythagorean Numerology is: 9

Images & Illustrations of velamen

  1. velamen


Find a translation for the velamen definition in other languages:

Select another language:

Discuss these velamen definitions with the community:

Word of the Day

Would you like us to send you a FREE new word definition delivered to your inbox daily?

Please enter your email address:     


Use the citation below to add this definition to your bibliography:


"velamen." Definitions.net. STANDS4 LLC, 2018. Web. 22 Apr. 2018. <https://www.definitions.net/definition/velamen>.

Are we missing a good definition for velamen? Don't keep it to yourself...

Nearby & related entries:

Alternative searches for velamen:

Thanks for your vote! We truly appreciate your support.