What's the difference between siliqua and siliquae?

Siliqua

Definition:

• (n.) Same as Silique.
• (n.) A weight of four grains; a carat; -- a term used by jewelers, and refiners of gold.

Example Sentences:

• (1) Sch.-Bip, Ammi visnaga (L.) Lam, Atriplex halimus L., Capparis spinosa L., Ceratonia siliqua L., Cleome droserifolia (Forssk.)

Siliquae

Definition:

• (pl. ) of Siliqua

Example Sentences:

• (1) Sch.-Bip, Ammi visnaga (L.) Lam, Atriplex halimus L., Capparis spinosa L., Ceratonia siliqua L., Cleome droserifolia (Forssk.)