different between substrate vs homeotropic

English

Etymology

Anglicization of substratum.

Pronunciation

• Hyphenation: sub?strate
• IPA^(key): /?s?bst?e?t/

Noun

substrate (plural substrates)

1. (biochemistry) What an enzyme acts upon.
2. (biology) A surface on which an organism grows, or to which an organism or an item is attached.

   The rock surface of a rockpool is the substrate for a sessile organism such as a limpet.

   • 2006, Edward A. Wasserman, Thomas R. Zentall, Comparative Cognition: Experimental Explorations of Animal Intelligence ?ISBN, page 520:

     Detach/subtract [tasks involve] Severing a fixed attachment between environmental objects (or the substrate) or removing object(s) from another unattached object, so the latter is a more useful tool.

3. An underlying layer; a substratum.
4. (linguistics) A language that is replaced in a population by another language and that influences the language imposed on its speakers.
5. (plating) A metal which is plated with another metal which has different physical properties.
6. (construction) A surface to which a substance adheres.
7. The substance lining the bottom edge of an enclosure.

   The substrate of an aquarium can affect the water's acidity.

   Stream substrate affects fish longevity.

Synonyms

• underlayer
• (underlying layer; linguistics): substratum

Translations

Verb

substrate (third-person singular simple present substrates, present participle substrating, simple past and past participle substrated)

1. (obsolete, transitive) To strew or lay under.
   • 1663, Robert Boyle, Considerations touching the Usefulness of Experimental Natural Philosophy

     The melted glass being supported by the substrated sand.

Adjective

substrate (comparative more substrate, superlative most substrate)

1. Having very slight furrows.

See also

• substrate on Wikipedia.Wikipedia

English

Adjective

homeotropic (comparative more homeotropic, superlative most homeotropic)

1. Describing the alignment of liquid crystals whose director is aligned perpendicularly to a substrate surface