layer vs germinal disc

layer and germinal disc both are nouns.

Word	Noun	Adjective	Verb	Adverb
layer	Yes	No	Yes	No
germinal disc	Yes	No	No	No

As nouns, germinal disc is a hyponym of layer; that is, germinal disc is a word with a more specific, narrower meaning than layer:

Other hyponyms of layer include blastoderm, blastodisc, germinal area, hypodermis.

layer (noun)	germinal disc (noun)
thin structure composed of a single thickness of cells	a layer of cells on the inside of the blastula
a hen that lays eggs
single thickness of usually some homogeneous substance
an abstract place usually conceived as having depth
a relatively thin sheetlike expanse or region lying over or under another

layer (verb)	germinal disc (verb)
make or form a layer