Rudra Gayatri

Shiva the name of the Lord is a mantra. The meaning of Shiva is "One Who is all Bliss and the giver of happiness to all." Lord Shiva e is considered as one of the Trinity of Hindu pantheon (Brahma, Vishnu, and Shiva). He is the supreme God in the Saiva religion (one among the six cults or religion or Shanmatha established by Adi Sankaracharya) or Saiva Siddhanta tradition of Hinduism. His name is referred as Rudra in Rig veda. ‘Although classically applied to the Absolute Brahman, Shiva can also refer to God (Ishwara) in His aspect of Dissolver and Liberator (often mistakenly thought of as "destroyer")’.
The icon Shiva linga is considered as the abstract form of Lord Shiva. Another icon Nataraja is represent Him as Lord of Dance. The Moola Mantra of Lord Shiva is Om Namashivaya. It is known as ‘Panchaksharam’ of five letter mantra. It forms exactly the central part of Sri Rudram and Sri Rudram forms the center part of Yajur Veda.

Rudra Gayatri
Aum Bhur Bhuvah Swaha
Aum Tadpurushaaya Vidvamahe,
Mahadevaaya Dheemahi
Tanno Rudra Prachodayaat

Meaning
Aum. Let us invoke the three realms of earth (-bhur), wind (-bhuvah) and fire (-swaha). Aum. Let us invoke the superlative (-tad) male (-purusha) and omniscient lord (-vidvamahe). Let us meditate and focus upon (-dheemahi) the supreme (-maha) lord (-devaaya). Let us ask Shiva (-rudra) to provide us inspiration and guidance (-prachodayaat) in our spiritual journeys.

Related Post: Gayatri on other Deities
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Shiva Gayatri
Sri Gayatri
Sri Shanmuga Gayatri