Depression, the thyroid and hormones. Depression is a common symptom of an underactive thyroid, also called hypothyroidism. A doctor will want to rule out other causes of the depression, and diagnosis of underactive thyroid may be reached once other symptoms have been explored, such as tiredness and weight gain.
Beneficial ownership. Beneficial ownership is a term used in international commercial legislation referred to anyone who enjoys the benefits of ownership of a security or property, and yet does not nominally own the asset itself. Webster's defines a beneficial owner as one who enjoys the benefit of a property of which another is the legal owner..
Plank owner refers to someone who was part of the original crew of a vessel or member of a unit from its inception. For example, the first sailors assigned to man the USS Saratoga are its plank-owners. In Naval parlance Plank owners are members of the vessels' Commissioning crew.