a.1.(Zool.) Proboscidate.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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The proboscidial papillae have numerous U-shaped ridges and the presetal lobes are triangular with those in the posterior of the body with a small digitate tip.
The bases of the hook supports are firmly attached to the proboscidial bulb septum by the nodus (Karling, 1961).
In an all-or-nothing mechanism, the column strikes the underside of the bee's head, momentarily even trapping it, and receives and deposits pollen in the proboscidial fossa (Westerkamp, personal observation).