This unsmoked, wet-cured ham is the sine qua non of Parisian butcher shops: a light, ephemeral meat, sweet but umami.
That accumulation of identities is already a sine qua non when speaking of Hispanics, like Zimmerman.
In the land of the industrial revolution, foreign ownership and management is the sine qua non of industrial success.
This enraged the President, and it was made a sine qua non, receive Mrs. Eaton, or quit the Cabinet.
We require every man in the Army, for that is the 'sine qua non' of victory.
The sine qua non of all poetry is absolutely correct grammar and freedom from redundancy.
It is the sine qua non of any hopeful outlook for the future of mankind.
They having made some kindly remark as to my hospital service, Dr. —— as kindly replied, "Yes, she is a sine qua non."
A sine qua non is that the glass be hot enough to melt the shellac.
The position of the place of entry of the ducts of the pancreas and liver assures that this sine qua non shall be present.
"an indispensable condition," Latin, literally "without which not," from sine "without" (see sans) + qua ablative fem. singular of qui "which" (see who) + non "not" (see non-). Feminine to agree with implied causa. The Latin phrase is common in Scholastic use. Sometimes a masculine form, sine quo non, is used when a person is intended. Proper plural is sine quibus non.
The essential, crucial, or indispensable ingredient without which something would be impossible: “Her leadership was the sine qua non of the organization's success.” From Latin, meaning “without which nothing.”