roll

(redirected from cotton roll)
Also found in: Dictionary, Thesaurus, Medical, Legal, Encyclopedia.

Roll

1. To buy or sell an option and then later buy or sell the same option with a different strike price because one believes the price trend will continue. For example, suppose one buys a call option giving one the right but not the obligation to buy a stock at $10. One does this if one believes the underlying price will be above $10 when the option expires. However, if it appears near expiration that the option is well above $10 and likely will continue to, say, $20, one may buy another call option with a longer expiration and a strike price of $14 in order to capture higher gains. Rolling options may provide an investor with time to take full advantage of a prolonged price trend. It may be done with both call options and put options.

2. See: Roll over.

roll

See roll over.
References in periodicals archive ?
Instead of using rubber dam most of the house officers were using cotton rolls alone (45.5%) or cotton rolls along with suction (35.9%) in order to provide isolation during restorative and endodontic procedures, hence compromising the clinical standards and longevity.
For both of these common issues, using the cotton roll trick described below will help with sensor placement and patient comfort.
Cotton rolls must either be centrifuged to obtain saliva (9) or be placed in the barrel of a syringe (needleless), from which the saliva is expressed into a vial by compression of the plunger (5).
One of the reasons may be that the participants believed that they could achieve moisture control through cotton roll and high volume evacuation.
Then a cotton plier or hemostat is used through the HVE inlet to grab the cotton roll or tooth particle and move it out through the HVE inlet, ideally using head-mounted lighting to better see the obstruction.
unfilled, etc) Step 3 Remove plaque and/or debris from tooth (pumice polishing with occlusal brush, air polishing *, or air abrasion *) Step 4 Rinse all polishing material from tooth Step 5 Isolate tooth with cotton rolls, Dri-Angles(tm) or Dry-Tips(tm) (If dental dam isolation is used, place the dam prior to polishing.) Step 6 Dry tooth and apply acid etch gel or liquid for manufacturer's recommended time Step 7 Rinse tooth well, remove isolation materials and replace with dry ones.
Limited tenders are invited for Supply of ABSORBENT COTTON ROLL 300 gm PACK: 1 X 300 gm ROLL
Tenders are invited for Supply of Surgical Cotton Roll
Tenders are invited for rate contract for absorbent and non absorbent cotton roll
Tenders are invited for Purchase of Surgical Consumables, Surgical Sutures, Bandages, Gauze Than and Absorbent Cotton Roll 200 gm.