volcanic bomb A lump of ejected lava, more than 32 mm across, that has acquired one of several characteristic shapes during its trajectory to the ground. For example, bread-crust bombs have a glassy crust, criss-crossed with cracks; a spindle bomb has a tail formed by the twisting or spinning of the blob as it falls; rope or ribbon bombs are twisted strands of solidified lava; and cannonball bombs are formed from solid lumps of lava that have been rounded by abrasion as they bounced to rest.
More From encyclopedia.com
Round , round / round/ • adj. 1. shaped like or approximately like a circle or cylinder: she was seated at a small, round table. ∎ having a curved shape like… bloodhound , bloodhound •abound, aground, around, astound, bound, compound, confound, dumbfound, expound, found, ground, hound, impound, interwound, mound, pound,… Acquired Characteristics , acquired characteristics Characteristics that are acquired by an organism during its lifetime, according to early evolutionary theorists (e.g. Lamarc… Theatre-in-the-round , Skip to main content Theatre-in-the-Round theatre-in-the-round •abound, aground, around, astound, bound, compound, confound, dumbfound, expound, foun… Shape , shape / shāp/ • n. 1. the external form or appearance characteristic of someone or something; the outline of an area or figure: she liked the shape o… round robin , round rob·in • n. 1. [often as adj.] a tournament in which each competitor plays in turn against every other: a round-robin competition. 2. a petitio…
About this article
Updated About encyclopedia.com content Print Article
You Might Also Like