Ortho is a Greek prefix meaning “straight”, “vertical”, “right” or “right”. Just as an orthodontist corrects the twisting of the teeth, an orthopedist corrects the twisting of the skeleton. Orthopedics is partly formed from the Greek word for child, and many orthopedic patients are in fact children. But adults also often need orthopedic therapy, such as when they suffer from a joint disease such as arthritis or when they recover from a broken arm or leg.
Ortho molecules rotate with odd rotational quantum numbers, while para-molecules rotate with even quantum numbers. This substance easily produces ortho-oxybenzoic acid or salicylic acid, which on nitration produces two mononitro-oxybenzoic acids. Examples of terms involving orthodontics include orthodontics (straightening teeth), orthopedics (straightening the child), orthopnea (breathing easily only in an upright position), orthostatic (an upright posture), etc. These example sentences are automatically selected from various online news sources to reflect current usage of the word “orthopedics”.
The influence of the position of an alkyl on aromatic bodies is well shown in ortho-, para- and meta-derivatives.