a. pertaining to, using or worked by air pressure. pneumatics, n. study of mechanics of gases. pneumatographer, n. person receiving and writing spirit messages. pneumatology, n. pneumatics; doctrine about spirits or Holy Ghost. pneumatomachy, n. denial of Holy Ghost's divinity. pneumatometer, instrument indicating the strength of the lungs by measuring the quantity of air inhaled and exhaled at a breath. pneumatophany, n. appearance of spirit or Holy Ghost. pneumatophony, n. sound caused by spirit. pneumatosis, n. presence of gas in body.
The flags of Qatar and Bahrain are very similar, reflecting the countries' historical links. The proportions of the Qatari flag are unique. Effective date: c. 1949.