Hotbed in spanish

Semillero

pronunciation: semijeɹ̩oʊ part of speech: noun
In gestures

hotbed = semillero. 

Example: Plants started in a hotbed and especially those started indoors should be 'hardened' before they are moved into the garden.

more:

» a hotbed of = un semillero de, un caldo de cultivo de, un foco de, una cantera de, una mina de.

Example: One of the most common misconceptions and criticisms held by the general public concerning universities is that they are hotbeds of radicalism, alcoholism, and sexism.
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