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SINCE 1828
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back bulb

noun
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Definition of back bulb

: a pseudobulb on certain types of orchid plants that remains on the plant after the terminal growth has been removed and is used in the propagation of certain orchids

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First Known Use of back bulb

1942, in the meaning defined above

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The first known use of back bulb was in 1942

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“Back bulb.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/back%20bulb. Accessed 6 December 2019.

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