The ripe seed, which grows as large as a rather small plum, is enclosed by a thick, fleshy envelope covering a hard woody shell with two or rarely three longitudinal keels.
bilge keels, made of Canadian rock elm were removed.
heretical thought here but how many people have dispensed with the bilge keels?
On the 21st May both bilge keels, made of Canadian rock elm were removed.
The word usage examples above have been gathered from various sources to reflect current and historial usage. They do not represent the opinions of YourDictionary.com.