A nonionic substance.    From Wordnet, Princeton University. 

Estuarine and coastal zone marine pollution by the nonionic alkylphenol ethoxylates endocrine disrupters: Is there a potential ecotoxicological problem?.    From Wordnik.com.  [OpEdNews - Quicklink: Experts: Endocrine Disruptor BPA Found in Bottles Worrisome] Reference

Omnipaque is the only nonionic, low osmolar contrast medium indicated for oral use3.    From Wordnik.com.  [Patient Preference For Omnipaque (Iohexol) Highlighted In First Head-To-Head Taste Test of Oral Contrast Agents - Yahoo! Finance] Reference

It is also important to add a nonionic surfactant to your spray tank (one-third fluid ounce per gallon).    From Wordnik.com.  [post-gazette.com - News] Reference

Brunner PH, Schaffner C (1984) 4-Nonylphenol in sewage sludge: accumulation of toxic metabolites from nonionic surfactants.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

It surveys the state of special gemini surfactants, including nonionic, zwitterionic, fluorinated, and amino-acid-based surfactants.    From Wordnik.com.  [AvaxHome RSS:] Reference

In general, the reactions which are known to occur upon parenteral administration of iodinated contrast agents are possible with any nonionic agent.    From Wordnik.com.  [Patient Preference For Omnipaque (Iohexol) Highlighted In First Head-To-Head Taste Test of Oral Contrast Agents - Yahoo! Finance] Reference

So the researchers recruited 100 patients (55 women; mean age 54.9) who had visible varicose veins and scanned their legs with three-dimensional CT using a nonionic contrast material, iopromide (Ultravist).    From Wordnik.com.  [MedPageToday.com - medical news plus CME for physicians] Reference

WARNINGS: Oral /Intravascular Use: Serious, rarely fatal, thromboembolic events causing myocardial infarction and stroke have been reported during angiographic procedures with both ionic and nonionic contrast media.    From Wordnik.com.  [Patient Preference For Omnipaque (Iohexol) Highlighted In First Head-To-Head Taste Test of Oral Contrast Agents - Yahoo! Finance] Reference

Mild cleansing compositions - Mild cleansing compositions comprising anionic, nonionic and / or amphoteric surfactants, one or more dyes having a total color, and one or more encapsulated dyes, including microencapsulated dyes, in microcapsules prepared by coacervation, precipitation, polycondensation or other reaction of anionic and cationic components, which encapsulated dyes have a total color different from.    From Wordnik.com.  [FreshPatents.com: Notable Patent Applications - 05/07/2009] Reference

1990s) contains a mixture of nonionic (48 per cent) and anionic (35 per cent) surfactants.    From Wordnik.com.  [Latest Articles] Reference