Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology 131birefringent a. [L. bis, two; refringens, refractive] Havingdouble refraction, high or low according to the differencebetween the refractive indices.birostrate a. [L. bis, two; rostrum, beak] Having two beak-likeprocesses.birotulate spicules (PORIF) A spicule having a disc or series ofradial, umbrella-like spokes at both ends; amphidiscs.birth pore Uterine pore; birth opening.bisegment n. [L. bis, two; segmentum, piece] One of twoequal segments of a line.biseptate a. [L. bis, two; septum, partition] Having two partitions.biserial a. [L. bis, two; series, row] Arranged in two rows, orsubdivided into two series.biserial crochets (ARTHRO: Insecta) Crochets of larvae withproximal ends arranged in two, usually concentric rows.see serial crochets.biserrate a. [L. bis, two; serra, saw] Having two notched orsaw-teeth.bisetose a. [L. bis, two; seta, bristle] Having two bristle-likeappendages.bisexual a. [L. bis, two; sexus, sex] 1. Of or pertaining to bothsexes. 2. A population composed of functional males andfemales. 3. An individual possessing functional male andfemale reproductive organs; hermaphrodite.bisinuate a. [L. bis, two; sinuare, to bend] Twice winding orbending; having two sinuations or notches.bistrate a. [L. bis, two; stratum, layer] Having two layers oftissues.bisulcate a. [L. bis, two; sulcus, groove] Of or pertaining totwice scored or grooved.bithecal a. [L. bis, two; theke, case] 1. Having two thecae. 2.(ANN) Having two spermathecae.bituberculate a. [L. bis, two; tuberculum, swelling] Havingtwo tubercles or swellings.biuncinate a. [L. bis, two; uncus, hook] Having two hooks.