English: veteran tree
Welsh: coeden hynod
Subject: Amgylchedd
English definition: A tree which, because of its great age, size or condition, is of exceptional cultural, landscape or nature conservation value. 
Welsh definition: Coeden sydd o werth eithriadol o ran cadwraeth natur, tirwedd neu ddiwylliant, oherwydd ei maint, cyflwr neu oedran anarferol.