meristem vs plant tissue

meristem and plant tissue both are nouns.

Word	Noun	Adjective	Verb	Adverb
meristem	Yes	No	No	No
plant tissue	Yes	No	No	No

As nouns, plant tissue is a hypernym of meristem; that is, plant tissue is a word with a broader meaning than meristem:

meristem: undifferentiated tissue from which new cells are formed, as at the tip of a stem or root
plant tissue: the tissue of a plant

meristem (noun)	plant tissue (noun)
undifferentiated tissue from which new cells are formed, as at the tip of a stem or root	the tissue of a plant