The Collaborative International Dictionary
acrocentric
acrocentric \acrocentric\ adj. 1. having a subterminal centromere an acrocentric chromosome
Wiktionary
acrocentric
a. (context genetics of a chromosome English) Having the centromere very near to one end, and thus having a long arm, and a very short arm. n. A chromosome that has the centromere very near to one end, and thus has a long arm, and a very short arm.
WordNet
acrocentric
adj. having a subterminal centromere; "an acrocentric chromosome"