In English there are no masculine or feminine forms. English uses gender specific nouns for a male or a female.
The gender specific nouns for a female crab are hen or jenny.
The gender specific nouns for a male crab are cock or jimmy.
The noun 'crab' is a common gender noun, a word for a male or a female.
feminine
"la moquette", (feminine noun).
une chaloupe (feminine noun)
Explication is a feminine noun in French.
Asie is a feminine noun in French.
The feminine form of the noun landlord is landlady.
Une personne (feminine noun)
"lentille" is a feminine noun in French.
Une ville (feminine noun)
The French noun "lunettes de soleil" is feminine.
Grass is "herbe" in French, which is a feminine noun.
"cette" means 'that' + feminine noun, or 'this' + feminine noun in French.