Floater

n. person or thing that floats; wanderer; one whose vote can be bought; one who does not belong to a particular political party

Floaters are deposits of various size, shape, consistency, refractive index, and motility within the eye's normally transparent vitreous humour. They may be of embryonic origin or acquired due to degenerative changes of the vitreous humour or retina. The perception of floaters is known as myodesopsia, or less commonly as myiodeopsia, myiodesopsia, or myodeopsia. When observed subjectively, floaters are entoptic phenomena characterized by shadow-like shapes that appear singly or together with several others in one's field of vision. They may appear as spots, threads, or fragments of cobwebs, which float slowly before one's eyes.
See more at Wikipedia.org...

Floater, n one or more spots that appear to drift in front of the eye, caused by a shadow cast on the retina by vitreous debris. [more]Floater - Community and Resources

Noun
1. spots before the eyes caused by opaque cell fragments in the vitreous humor and lens
(synonym) musca volitans, muscae volitantes, spots
(hypernym) symptom
2. a debt instrument with a variable interest rate tied to some other interest rate (e.g. the rate paid by T-bills)
(hypernym) debt instrument, certificate of indebtedness
3. a wanderer who has no established residence or visible means of support
(synonym) vagrant, drifter, vagabond
(hypernym) wanderer, roamer, rover, bird of passage
(hyponym) beachcomber
4. an employee who is reassigned from job to job as needed
(hypernym) employee
5. a voter who votes illegally at different polling places in the same election
(hypernym) voter, elector
6. a swimmer who floats in the water
(hypernym) swimmer, natator, bather
(derivation) float, swim
7. an object that floats or is capable of floating
(hypernym) object, physical object
(hyponym) iceberg, berg
(derivation) float, swim
8. an insurance policy covering loss of movable property (e.g. jewelry) regardless of its location
(synonym) floating policy
(hypernym) policy, insurance policy, insurance

A type of bond in which the bond's interest rate varies with the interest rate of another debt instrument e.g. a bond that has the interest rate of the Treasury bill  + .25%.