Medical Language - Combining Forms - Chapters 9 - 11 Obstetrics and Neonatology, Cardiovascular and Lymphatic Systems, Digestive System - combining forms with definitions Tools A B angi/o vessel (usually refers to blood vessel) aort/o aorta arteri/o artery atri/o atrium cardi/o heart coron/o heart lymph/o lymph phleb/o vein plasm/o plasma splen/o spleen thym/o thymus gland valv/o valve valvul/o valve ventricul/o ventricle ather/o yellowish, fatty plaque bacteri/o bacteria ech/o sound electr/o electricity, electrical activity isch/o deficiency, blockage sphygm/o pulse steth/o chest therm/o heat thromb/o clot amni/o, amnion/o amnion, amniotic fluid chori/o chorion embry/o embryo, to be full fet/o, fet/i fetus, unborn child gravid/o; cyes/o; cyes/i pregnancy puerper/o childbirth cephal/o head lact/o milk nat/o birth omphal/o umbilicus, navel par/o, part/o bear, give birth to; labor, childbirth esophag/o esophagus pelv/i, pelv/o pelvic bone, pelvis prim/i first pseud/o false pylor/o phylorus an/o anus anr/o antrum cec/o cecum col/o colon duoden/o duodenum enter/o intestine esophag/o esophagus gastr/o stomach ile/o ileum jejun/o jejunum proct/o, rect/o rectum sigmoid/o sigmoid colon stomat/o, or/o mouth appendic/o appendix cheil/o lip chol/e gall, bile cholangi/o bile duct choledoch/o common bile duct diverticul/o diverticulum, or blind pouch, extending from a hollow organ gingiv/o gum glass/o/, lingu/o tongue hepat/o liver herni/o hernia, or protrusion of an organ through a body wall. lapar/o, abdomin/o, celi/o abdomen (abdominal cavity) palat/o palate pancreat/o pancreas peritone/o peritoneum pylor/o pylorus, pyloric sphincter polyp/o polyp, small growth sial/o saliva, salivary gland uvul/o uvula