Ūrdhvasaṁhanana (Urdhvasamhanana)is one of the of God Śiva (Siva). While explaining the meaning of this name, Nīlakaṇṭha (Nilakantha), the commentator has said —
Ūrdhvasaṁhanana; śreṣṭho dṛḍhaśarīraścetyarthaḥ.
The term ‘saṁhanana'(samhanana) means tough or firm. Nīlakaṇṭha has explained the name as an adjective for the tall and stout bodily shape of God Śiva.