Trigonidium egertonianum is an orchid found in Central and South America.

The specific epithet "egertonianum" is named for Sir Philip Grey Egerton.

[1] Trigonidium egertonianum has densely clustered pseudobulbs, ovoid in shape with two leaves.

The orchid's inflorescence arises on mature growths, ranging from 25–45 cm (9.8–17.7 in) in length.

The species is epiphytic and grows on large, wet branches up to 900 m (3,000 ft) in altitude.