Noun:

द्रव-स्त्राव वक्र,

siphonal's Usage Examples:

are about 13 smaller ribs extending nearly to the siphonal canal and reticulating the spiral sculpture.

The siphonal notch is situated at the top.

The shell has a long and narrow aperture, and a short siphonal canal, with another indentation near the anterior end called a stromboid notch.

The broad siphonal canal is unnotched and of moderate length.

Cameral and siphonal deposits developed later than in most pseudorthocerids and are thus confined.

Strombidae have a notch in the edge of the shell aperture not far from the siphonal canal.

The siphonal canal is an anatomical feature of the shells of certain groups of sea snails within the clade Neogastropoda.

snails whose shell has a high spire and a noticeable siphonal canal (in other words, the shell comes to a noticeable point at both ends).

possession of eyes, in its straight wide siphonal canal, and in having a feebler type of verge, anal notch and fasciole.

spire sunken but not immersed; lip strongly thickened, smooth, lacking denticulation, flared posteriorly; siphonal notch absent; posterior notch absent;.

subpyriform (generally pear-shaped), with a large body whorl and a straight siphonal canal.

The long siphonal canal is straight and unnotched, showing primary and secondary spirals.

smooth or axially costate; lip thickened, smooth or denticulate; external varix absent; siphonal notch absent; posterior notch absent; columella multiplicate.