GYROLITE Meaning of GYROLITE in English ˈjīrəˌlīt noun( -s )Etymology: gyr- + -lite: a mineral Ca 2 Si 3 O 7 (OH) 2 .H 2 O consisting of hydrous calcium silicate in white concretions Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012