phototransistor

[ foh-toh-tran-zis-ter ]

/ ˌfoʊ toʊ trænˈzɪs tər /

noun Electronics.

a transistor that amplifies current induced by photoconductivity.

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How well do you know your adjectives from your adverbs? Your preposition from your pronouns? Your interjections from your conjunctions? Let’s put your knowledge of parts of speech to the text! Note: Many of the following questions will ask you to identify the parts of speech “in order.” That means the first word in all capital letters will correspond to the first option in an answer, and so on.

Question 1 of 10

In order, what parts of speech are the words in all capital letters? Alisa was VERY tired, SO she decided to go to bed.

adverb, adverb

adverb, conjunction

adjective, conjunction

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Origin of phototransistor

First recorded in 1945–50; photo- + transistor

Words nearby phototransistor

photothermic, phototonus, phototopography, phototoxic, phototoxin, phototransistor, phototroph, phototrophic bacteria, phototropic, phototropism, phototropy

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for phototransistor

phototransistor

/ (ˌfəʊtəʊtrænˈzɪstə) /

noun

a junction transistor, whose base signal is generated by illumination of the base. The emitter current, and hence collector current, increases with the intensity of the light

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for phototransistor

phototransistor

[ fō′tō-trăn-zĭs′tər ]

A transistor that regulates current or switches it on and off based on the intensity of the light it is exposed to rather than an external electric signal. Phototransistors are used in many electric-eye applications, including digital cameras, in which millions of tiny phototransistors map an image into an array of electrical signals. See also photoelectric effect.