Geol. [f. L. amygd(ala) almond + -ULE, after nodule, etc.] (See quot.)
1877. Le Conte, Elem. Geol. (1879), 211. Sometimes the filling has taken place very slowly by successive additions of different coloured material. Thus are formed the beautiful agate pebbles, or more properly, amygdules.
1882. Geikie, Text-bk. Geol., II. II. ii. 62. Secondary minerals (amygdules) such as calcite, calcedony, quartz, and zeolites.
