Initialism of irritable bowel syndrome.

• A chronic functional gut disorder with pain and bowel changes.

肠易激综合征的缩写。

• 以腹痛和排便习惯改变为特征的功能性肠病。

Initialism of identical by state (genetics).

• Same allele state without proven shared ancestry.

群体遗传学中“状态相同”的缩写。

• 等位基因状态相同但来源未必相同。

Initialism of ichthyosis bullosa of Siemens.

• A rare inherited skin disorder causing blistering and scaling.

西门子大疱性鱼鳞病的缩写。

• 罕见的遗传性皮肤病，起疱并脱屑。

Initialism for an International Baccalaureate program or school.

• A curriculum offered by the International Baccalaureate organization.

国际文凭课程的缩写。

• 由国际文凭组织提供的课程体系。