bone lacuna a small cavity within the bone matrix, containing an osteocyte, and from which slender canaliculi radiate and penetrate the adjacent lamellae to anastomose with the canaliculi of neighboring lacunae, thus forming a system of cavities interconnected by minute canals.owship's lacuna. the concave cavities which are formed by osteoclasts in the process of bone resorption. osseous lacuna. bone lacuna (see above). osteocytic lacuna. see bone lacuna (above). urethral lacuna. numerous small depressions or pits in the mucous membrane of the urethra. vascular lacuna.
a wagering pool that involves a sports event or contest, if the pool is conducted for profit, and (3) wagers placed in a lottery conducted for profit. See section 7.
An Exacta Wager (or in some areas it is called a Perfecta) involves picking two horses that you believe will finish first and second. Because you must select two horses, this wager is generally harder to hit than a straight wager, but usually pays greater dividends when you do hit it.