The eponymous "Welcker's angle" is named after him, which is the anterior, inferior angle of the parietal bone.

The aperture is large, broadly oval, somewhat flaring at the anterior lateral angle.

The internasal scales are much narrowed anteriorly and subtriangular, with the anterior angle truncated and as long as the prefrontal scales.

Pronotum narrower than elytron, its laterally marginal, with 3-4 sharp teeth and thickened anterior angles.

Scheuermann's disease describes a condition where the vertebrae grow unevenly with respect to the sagittal plane; that is, the anterior angle is often greater than the posterior.

The outer lip is thin, and bent almost at right angles to the anterior lateral angle.

Golden setae are located on posterior angles of the head and slightly on the anterior angle of the pronotum.

The vocal process is the anterior angle of the base of the arytenoid cartilage, as it projects horizontally forward and gives attachment to the vocal ligament.

Transparent lenses displayed an average anterior fetal elliptical angle of 26 while the cataracts averaged 23 , a decrease of 12%.

The ribs form cusps at the anterior angle of the shoulder, anterior to which they become enfeebled.