Is “Premiss” a Scrabble word?

1.A proposition antecedently supposed or proved; something previously stated or assumed as the basis of further argument; a condition; a supposition.

2.Any of the first propositions of a syllogism, from which the conclusion is deduced.

3.(usually in the plural) Matters previously stated or set forth; especially, that part in the beginning of a deed, the office of which is to express the grantor and grantee, and the land or thing granted or conveyed, and all that precedes the habendum; the thing demised or granted.

1.To state or assume something as a proposition to an argument.

2.To make a premise.

3.To set forth beforehand, or as introductory to the main subject; to offer previously, as something to explain or aid in understanding what follows.