Noun:

கண்ணீரெலும்புகள்,

umbones's Usage Examples:

In the entire animal the posterior end projects slightly more than the anterior from the region of the umbones.

The young Brachiopod in all its species is protected by an embryonic shell called the " protegulum," which sometimes persists in the umbones of the adult shells but is more usually worn off.

-Mantle largely closed, pedal orifice small; gill-plates of equal size; shell globular, with prominent and coiled umbones.

a, b, right and left valves of the shell; c, d, the umbones or short arms of the lever; e, f, the long arms of the lever; g, the hinge; h, the ligament; i, the adductor muscle.

-Shell inequilateral, with anterior umbones and prominent anterior auricula; cardinal border arched.

-Shell equivalve, greatly elongated, umbones very far forward.

Hinge pliodont, that is to say, it has numerous teeth on either side of the umbones and the teeth are perpendicular to the edge.

-Shell thin, very inequilateral, anterior part atrophied, umbones projecting.

Trigonia; shell sub-triangular, umbones directed backwards.

-Siphons present; external gill-plate smaller than the internal; umbones not prominent.