Article 790

The words of a will are to be taken in their ordinary and grammatical sense, unless a clear intention to use them in another sense can be gathered, and that other can be ascertained.

Technical words in a will are to be taken in their technical sense, unless the context clearly indicates a contrary intention, or unless it satisfactorily appears that the will was drawn solely by the testator, and that he was unacquainted with such technical sense. (675a)